1Th 4:13 But I do not want you to be ignorant, brethren, concerning those who have fallen asleep, lest you sorrow as others who have no hope.
1Th 4:14 For if we believe that Jesus died and rose again, even so God will bring with Him those who sleep in Jesus. (Group A)
1Th 4:15 For this we say to you by the word of the Lord, that we who are alive and remain until the coming of the Lord will by no means precede those who are asleep.
1Th 4:16 For the Lord Himself will descend from heaven with a shout, with the voice of an archangel, and with the trumpet of God. And the dead in Christ will rise first. (Group C)
1Th 4:17 Then we who are alive and remain shall be caught up together with them in the clouds to meet the Lord in the air. And thus we shall always be with the Lord.
1Th 4:18 Therefore comfort one another with these words.
Those living that are left of those nations cannot be the enemies of God, or they would be in group B, and would have been destroyed.
If they are not the enemies of God and are alive at the Second Coming of Christ, who would they be?
1Jn 2:22 Who is a liar but he who denies that Jesus is the Christ? He is antichrist who denies the Father and the Son.
1Jn 2:23 Whoever denies the Son does not have the Father either; he who acknowledges the Son has the Father also.
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Let's look at the text again, in Zechariah 14.
Zechariah 14:16 And it shall come to pass, that every one that is left of all the nations which came against Jerusalem shall even go up from year to year to worship the King, the LORD of hosts, and to keep the feast of tabernacles.
17 And it shall be, that whoso will not come up of all the families of the earth unto Jerusalem to worship the King, the LORD of hosts, even upon them shall be no rain.
18 And if the family of Egypt go not up, and come not, that have no rain; there shall be the plague, wherewith the LORD will smite the heathen that come not up to keep the feast of tabernacles.
19 This shall be the punishment of Egypt, and the punishment of all nations that come not up to keep the feast of tabernacles.
The first thing to take note of here, is this. These are obviously not living in Jerusalem if they instead have to come up to Jerusalem to be in Jerusalem.
John 14:1 Let not your heart be troubled: ye believe in God, believe also in me.
2 In my Father's house are many mansions: if it were not so, I would have told you. I go to prepare a place for you.
3 And if I go and prepare a place for you, I will come again, and receive you unto myself; that where I am, there ye may be also.
Where will Christ obviously be dwelling once He returns? In the new Jerusalem of course. The text above indicates that those who believe in Him, that when He comes again, that where He is, there ye may be also. If He is dwelling in the NJ, but that these in Zechariah 14:16 are not dwelling in the NJ, it shouldn't take a rocket scientist to figure out that these are not ones that believed in Him, because if they had, they would be where He is, unless one wants to claim Jesus didn't know what He was talking about in John 14:1-3.
The next thing to take note of is this----and it shall be, that whoso will not come up of all the families of the earth unto Jerusalem to worship the King, the LORD of hosts, even upon them shall be no rain. And if the family of Egypt go not up, and come not, that have no rain; there shall be the plague, wherewith the LORD will smite the heathen that come not up to keep the feast of tabernacles. This shall be the punishment of Egypt, and the punishment of all nations that come not up to keep the feast of tabernacles.
Seriously, does it sound like anyone in John 14:1-3 could possibly be among someone that would be under the threat of punishment for not coming up to Jerusalem? And not only that, logic says that if these in John 14:1-3 are where Christ is, they wouldn't need to come up to Jerusalem, they would already be there. Apparently you prefer your doctrine over Scripture, since you are willing to contradict John 14:1-3 via your doctrine by apparently claiming these in Zechariah 14:16 are also among the blessed saved. So why aren't they dwelling where Christ is dwelling then?