You've raised some EXCELLENT questions but I think they all go away fairly easy when we see something about the way 'antichrist' is uses in the verses above. Wow, but I have to laugh, because your questions about the 'signs and wonders' had me scratching my head and seriously wondering if I was going to abandon my Amillennialism and become a futurist after all! (Maybe I haven't had enough sleep.

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Hello eclipse. Sorry it has taken me so long to respond - I have been a little busy of late. Thanks for the compliment - nice talking with you about this issue.
Once you realise that the 'man of lawlessness' and 'antiChrist' are interchangeable pictures of a certain spirit at work, then we can see that antiChrists can have been both back at AD70 when Jerusalem fell, and finally exposed at the Return of the Lord on Judgement Day.
It works like this.
There are many "the antichrist" figures. That is, many instances of the metaphor of a singular figure.
John seems to use the term AntiChrist more than anyone. I see no reference here to a global supreme ruler who will deceive all the nations, then become the Abomination that causes Desolation, or any particular instruction about what to do about such a singular figure in history.
Indeed, John's language plays down the expectation of a singular figure, especially as he uses the metaphor of a singular figure many times!
Watch it transform from one singular figure they've 'heard' about to the many singular figures in the verses below. 'The antiChrist" becomes a metaphor of general badness, which is how my scholarly friends think 2 Thess 2 is talking!
1 John 2:18
18Dear children, this is the last hour; and as you have heard that the antichrist is coming, even now many antichrists have come. This is how we know it is the last hour.
1 John 2:22
22Who is the liar? It is the man who denies that Jesus is the Christ. Such a man is the antichristhe denies the Father and the Son.
1 John 4:3
3but every spirit that does not acknowledge Jesus is not from God. This is the spirit of the antichrist, which you have heard is coming and even now is already in the world.
2 John 1:7
7Many deceivers, who do not acknowledge Jesus Christ as coming in the flesh, have gone out into the world. Any such person is the deceiver and the antichrist.
John does not say 'any such person is an antiChrist' but is THE antichrist. But that First Century Greek grandma down the road who denied Jesus came in the flesh, surely she cannot be THE antiChrist? But that's the way it reads! Because it's a metaphor. Any such person is the deceiver and the antichrist.
If John speaks about many individuals as THE antiChrist, it is clearly a metaphor, a nasty label, describing people in a very dangerous state.
Yes, John does describe different individuals as "the antichrist." However, what we are really talking about here is the 'man of lawlessness' in 2 Thess. 2. The 'antichrist' is just a term I use to describe this individual. More on this later as I see you have addressed this further down in your post.
This makes sense of Jesus warning about all the false Messiah's that would rise around AD70. "For false Christs and false prophets will appear and perform great signs and miracles to deceive even the electif that were possible. 25 See, I have told you ahead of time."
They would lead vast armies out into the desert to fight the Romans, surely a sign in and of itself. But they were wrong about who Jesus Christ really was, and they were defeated.
Yes, there have always been messianic pretenders. And yes, there were a few around prior to and after 70 AD (Simon Bar Kochba is an example). So those would be covered by Christ's warning against false christs/false prophets.
But notice that Christ says that they shall perform great signs/wonders to deceive the elect. Just where were these signs/wonders in these false christs you're referring to?
The fact of the matter is also that, as I pointed out previously, the description of false christs given by Christ in Mt. 24:24-25 corresponds exactly to Paul's description in 2 Thessalonians 2. There is no other conclusion but that Paul and Christ are talking about the same individual.
This also makes sense of the 'man of lawlessness' in 2 Thess 2. For surely, just as certain false faith healers steal the limelight in the church (the modern temple of God), and just as John warned against all manner of antiChrists in the singular metaphor of THE ANTICHRIST, so too 2 Thess 2 is using the metaphor of a singular figure to explain that evil will be revealed. But the good news is that the evil one cannot use his many instances of singular antichrist to permanently maim the church because "the one who now holds it back will continue to do so till he is taken out of the way." This is a common theme in Revelation, that amidst all the persecution of these last days (2000 years and counting since Acts 2), the Lord will give his church rest on occasions. We will not be snuffed out. We are to trust in him, avoid the antichrist's and warn others about antichrists, for they are everywhere.
But where are we given the indication in 2 Thess. 2 that Paul is using the man of lawlessness figuratively?
" 2 not to become easily unsettled or alarmed by the teaching allegedly from uswhether by a prophecy or by word of mouth or by letter
asserting that the day of the Lord has already come. 3 Dont let anyone deceive you in any way, for
that day will not come until the rebellion occurs and the man of lawlessness[a] is revealed, the man doomed to destruction. 4 He will oppose and will exalt himself over everything that is called God or is worshiped, so that he sets himself up in Gods temple, proclaiming himself to be God.
5 Dont you remember that when I was with you I used to tell you these things? 6 And now you know what is holding him back, so that he may be revealed at the proper time. 7 For the secret power of lawlessness is already at work; but the one who now holds it back will continue to do so till he is taken out of the way. 8 And then the lawless one will be revealed, whom the Lord Jesus will overthrow with the breath of his mouth and destroy by the splendor of his coming. 9 The coming of the lawless one will be in accordance with how Satan works. He will use all sorts of displays of power through signs and wonders that serve the lie," 2 Thess. 2:2-9 (NIV)
Notice that Paul puts the advent of the man of lawlessness in context with the 'day of the Lord' - that would be the day of Christ's return. So Paul is speaking about something that will happen at the end of the age.
So 2 Thess. 2 corresponds exactly with the warnings of 'false christs' in Mt. 24. 2 Thess. 2 is in the context of the end of the age, and, if we read Mt. 24 closely, it is in the context of the end of the age as well (as I pointed out in my previous post).
Lastly: the fact that Matthew 24 talks on the one hand about not being deceived by the signs and wonders of lying antiChrist's, and on the other hand about the end of the world, is to be expected in a passage that jumps from answering questions about when that temple* to then talking about the end of this world, and how they would not be deceived by false Christs if they just remembered that when Jesus does return, it's the end of the entire created order!
Look at what Christ says in Matthew 24:
"15 When ye therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoso readeth, let him understand

16 Then let them which be in Judaea flee into the mountains:
17 Let him which is on the housetop not come down to take any thing out of his house:
18 Neither let him which is in the field return back to take his clothes.
19 And woe unto them that are with child, and to them that give suck
in those days!
20 But pray ye that your flight be not in the winter, neither on the sabbath day:
21
For then shall be great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be.
22 And except
those days should be shortened, there should no flesh be saved: but for the elect's sake
those days shall be shortened.
23 Then if any man shall say unto you, Lo, here is Christ, or there; believe it not.
24 For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect.
25 Behold, I have told you before.
26 Wherefore if they shall say unto you, Behold, he is in the desert; go not forth: behold, he is in the secret chambers; believe it not.
27 For as the lightning cometh out of the east, and shineth even unto the west; so shall also the coming of the Son of man be.
28 For wheresoever the carcase is, there will the eagles be gathered together.
29
Immediately after the tribulation of those days shall the sun be darkened, and the moon shall not give her light, and the stars shall fall from heaven, and the powers of the heavens shall be shaken:" Mt. 24:15-29
Mt. 24:29 is without a doubt referring to the events of the sixth seal in Revelation 6, which is clearly the advent of Christ. The problem is that Mt. 24:29 is connected to the rest of the entire discourse that I quoted by means of the phrase "immediately after the tribulation of those days." This connects the entire discourse of at least Matthew 24:15 onward to the last days. Obviously, then, the warning of false christs would be a warning for the last days - which makes perfect sense since Paul connects the advent of the 'man of lawlessness' with the return of Christ (as has already been shown).
I think part of the misunderstanding of Christ's eschatological discourse stems from the fact that each of the Synoptics preserves
only a part of the full discourse. What I'm trying to say is that in Matthew Christ doesn't answer the question of when the temple will be destroyed. Matthew simply did not preserve that part of the discourse - however, it is preserved in Luke 21.
In reality, Christ probably said a lot more than is preserved in the gospels. All we have is what each evangelist chose to transmit to us.
If we combine Luke 21 and Matthew 24, the full question about the end of the age and the end of the temple gets answered. We see that Christ's discourse from Matthew 24:15 onward is actually referring to the end of the age.
* they were asking about THAT temple because they were looking at it with their own eyes, drawing Jesus attention to it, and then Jesus answered about THAT temple, not some still hypothetical 3rd temple. You'd have to do all kinds of damage to the text to insist Jesus was actually talking about a 3rd temple 2000 years removed from what the disciples were asking.
Right, Christ answered their question in Luke 21. Matthew 24 is not even the full discourse, nor is Mark 13, nor is Luke 21. Only a portion has been preserved. In Matthew 24 Christ does not answer the question about the end of the temple. Matthew simply chooses to omit that portion from his writing and skip directly to the end of the age.
No, it simply means the time will be cut short, it won't go on forever. The trials and tribulation which the People of God have faced won't go on forever, but Christ will come again, and will set all things right.
Ok, so how is the time cut short if it has been directly prophesied as lasting a certain length? Are you sure there is no way this could connect with the plague in Revelation where 'the day shone not for the third part of it, and the night likewise?'
The midnight cry is "The Bridegroom comes!". The faithful virgins were not caught off guard at his coming. Midnight, the middle of the night, as in "thief in the night" when we do not expect. Our Lord will come according to His own timing, and while we cannot predict or anticipate when; we can stand vigilant, faithful, and be found counted among those who were faithful and not wasteful--as the Parable of the Talents shows us.
Right, but what exactly is the midnight cry? What event is it? The parable indicates that there is some event which triggers a massive realization that Christ is about to return very quickly - evidently so quickly that the foolish bridesmaids don't have time to get the oil (Holy Spirit?) for their lamps.
Also, notice that even the bridesmaids who had oil in their lamps were sleeping. Sleeping is usually a negative image in the NT. So there is something wrong with the entire church near the time of the end.