If you don't want to read the whole thing, just look at the bold areas. Paul makes a very specific point, unless the explicit Postrib Teaching is deliberately obscured by the insertion, awkwardly, of a foreign Pretrib Theology. In effect Paul is saying that Christ cannot come for the Church until after Antichrist is both revealed and destroyed. He is saying, quite explicitly, that Christ will *only* come at the point in time when he will come to destroy the Antichrist.
2 Thes 2.Concerning the coming of our Lord Jesus Christ and our being gathered to him, we ask you, brothers and sisters, 2 not to become easily unsettled or alarmed by the teaching allegedly from us—whether by a prophecy or by word of mouth or by letter—asserting that the day of the Lord has already come. 3 Don’t let anyone deceive you in any way, for that day will not come until the rebellion occurs and the man of lawlessness is revealed, the man doomed to destruction...
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.
Paul's eschatology here is based on what Jesus said in his Olivet Discourse, namely that he would not come to establish his Kingdom until after false Christs and false prophets would come to deceive God's People. There would be a period in which Israel would be cast aside in a "Great Tribulation," which is the Jewish Diaspora. And it would only be *after* the Tribulations of that time that he would come to establish his Kingdom. In other words, antichrists *precede* his Coming for his People.
Matt 24.
21 For then there will be great distress, unequaled from the beginning of the world until now—and never to be equaled again.
22 “If those days had not been cut short, no one would survive, but for the sake of the elect those days will be shortened. 23 At that time if anyone says to you, ‘Look, here is the Messiah!’ or, ‘There he is!’ do not believe it. 24 For false messiahs and false prophets will appear and perform great signs and wonders to deceive, if possible, even the elect. 25 See, I have told you ahead of time.
26 “So if anyone tells you, ‘There he is, out in the wilderness,’ do not go out; or, ‘Here he is, in the inner rooms,’ do not believe it. 27 For as lightning that comes from the east is visible even in the west, so will be the coming of the Son of Man. 28 Wherever there is a carcass, there the vultures will gather.
29 “Immediately after the distress of those days
“‘the sun will be darkened,
and the moon will not give its light;
the stars will fall from the sky,
and the heavenly bodies will be shaken.’
30 “Then will appear the sign of the Son of Man in heaven.
Please note above that Jesus said he will come in the context of judgment, such as when a carcass lay dead, when the heavenly bodies are shaken. This refers to the destruction of the Antichrist.
And Jesus in turn got his eschatology from Daniel 7, where the prophecy of the Antichrist, the Little Horn, originated. He is not there labeled "the Antichrist," as the Apostle John referred to him, but he appears to bring destruction to God's People, boasting against God, which in effect means that he is making himself to be God. And next, the Son of Man is seen to be appearing from heaven, to bring judgment against this Antichrist, in order to establish God's Kingdom on earth. This Antichrist will be, in effect, an anti-Son of Man, or anti-Messiah. John called him the anti-Christ.
Notice the emphasis here on the *destruction of the Antichrist,* which is precisely what both Jesus and Paul referred to, in speaking of the context in which Messiah would come.
Dan 7.11 “Then I continued to watch because of the boastful words the horn was speaking. I kept looking until the beast was slain and its body destroyed and thrown into the blazing fire. 12 (The other beasts had been stripped of their authority, but were allowed to live for a period of time.)
13 “In my vision at night I looked, and there before me was one like a son of man, coming with the clouds of heaven. He approached the Ancient of Days and was led into his presence. 14 He was given authority, glory and sovereign power; all nations and peoples of every language worshiped him. His dominion is an everlasting dominion that will not pass away, and his kingdom is one that will never be destroyed.