Matthew 24:30a is the sixth seal event.
Matthew 24:30b is Jesus's second coming to planet earth to end the great tribulation, and bring the Kingdom of God to rule over all the nations of the earth which he will reign and rule here on earth for a thousand years.
Matthew 24:31 is the completion of the gathering of the Jews out of the nations back to the land of Israel, at the beginning of the millennium.
The elect only refer to believers, both Jew and Gentile, and not to all Jews. You are not letting scripture interpret scripture for you.
Colossians 3:11 Where
there is neither Greek nor Jew, circumcision nor uncircumcision, Barbarian, Scythian, bond nor free:
but Christ is all, and in all. 12 Put on therefore, as
the elect of God, holy and beloved, bowels of mercies, kindness, humbleness of mind, meekness, longsuffering;
Scripture teaches that the elect are all of those who are in Christ, whether Jew or Gentile.
There is no basis whatsoever for thinking that Matthew 24:29-31 is not referring to the same event as 1 Thess 4:13-5:9.
Revelation 20:4-6 is the resurrection of the martyred great tribulation saints, also at the beginning of the millennium.
1 Thessalonians 4:15 is Jesus coming for believers, the rapture, to take them from the earth, so that they don't have to go through the wrath to be poured out during the great tribulation and Satan's wrath as his kingdom overshadowing the earth is being dismantled, and all of the hardships thereof.
If you see "the resurrection of the martyred great tribulation saints, also at the beginning of the millennium" as being the first resurrection then what about the resurrection that you think occurs before that when the rapture occurs? This is a major hole in your doctrine. You have "the first resurrection" occurring after a previous resurrection. How can that be?
Also, look what it says about those who have part in the first resurrection.
Rev 20:6
Blessed and holy is he that hath part in the first resurrection: on such the second death hath no power,
but they shall be priests of God and of Christ, and shall reign with him a thousand years.
So, you believe this only applies to "martyred great tribulation saints"? So, does that mean you believe that the dead in Christ raised at the coming of the Lord and those who are alive and remain at the time (1 Thess 4:14-17) don't get to reign with Christ and will not be "priests of God and of Christ"?
If so, what do you make of this passage:
Rev 1:5 And from
Jesus Christ, who is the faithful witness, and the first begotten of the dead, and
the prince of the kings of the earth. Unto him that loved us, and washed us from our sins in his own blood, 6 And
hath made us kings and priests unto God and his Father; to him be glory and dominion for ever and ever. Amen.
How can it be that only martyred trib saints would reign with Christ as priests of God and of Christ when in this passage John said that Jesus, "the prince of the kings of the earth", had already made him and his fellow believers "kings and priests unto God and his Father"? Doesn't this make it clear that all believers reign with Christ and are "priests of God and of Christ"?
Shouldn't we allow scripture to interpret scripture here and see that Jesus has been reigning a long time already and that His followers have been "priests of God and of Christ" this whole time? I believe so.
Hebrews 9:28 is to the Jews who will be rescued, saved, from the persecution of Satan, the beast, the false prophet, and them doing their work. Jesus appeared to the Jews at his first coming, and will appear to the Jews again at his second coming, in power and glory. This time they will be eagerly awaiting Him saying blessed is He who comes in the name of the Lord. Matthew 23:39.
There are many problems with this interpretation, but one of those would be the fact that, in your doctrine, Jesus appearing at His second coming after the tribulation is Him appearing a third time rather than a second time. So, your doctrine contradicts Hebrews 9:28 in that way and a number of other ways as well.
One of the other ways that your interpretation of Hebrews 9:28 contradicts scripture is the fact that God is not a respecter of persons and salvation is not based on one's ethnicity or nationality. Your interpretation of Hebrews 9:28 makes salvation about one's ethnicity and nationality and that contradicts God's character of not being a respecter of persons.