2Thes 2:1; Now we request you, brethren, with regard to the coming of our Lord Jesus Christ and our gathering together to Him,
2Thes 2:2; that you not be quickly shaken from your composure or be disturbed either by a spirit or a message or a letter as if from us, to the effect that the day of the Lord has come.
2Thes 2:3; Let no one in any way deceive you, for it will not come unless the apostasy comes first, and the man of lawlessness is revealed, the son of destruction,
2Thes 2:4; who opposes and exalts himself above every so-called god or object of worship, so that he takes his seat in the temple of God, displaying himself as being God.
2Thes 2:5; Do you not remember that while I was still with you, I was telling you these things?
2Thes 2:6; And you know what restrains him now, so that in his time he will be revealed.
2Thes 2:7; For the mystery of lawlessness is already at work; only he who now restrains will do so until he is taken out of the way.
2Thes 2:8; Then that lawless one will be revealed whom the Lord will slay with the breath of His mouth and bring to an end by the appearance of His coming;
2Thes 2:9; that is, the one whose coming is in accord with the activity of Satan, with all power and signs and false wonders,
2Thes 2:10; and with all the deception of wickedness for those who perish, because they did not receive the love of the truth so as to be saved.
2Thes 2:11; For this reason God will send upon them a deluding influence so that they will believe what is false,
2Thes 2:12; in order that they all may be judged who did not believe the truth, but took pleasure in wickedness.
I notice here it talks about Jesus coming back and gathering us together with Him. But I also notice it says this won't happen until...
The apostasy happens, and the man of lawlessness (perdition).. the beast.. is revealed. He will put himself in the temple of God (most believe the temple in Jerusalem will be built a 3rd time)
So it seems the "coming of Jesus to gather the saint with Him will not happen until "after" these things happen.
I also notice here, Jesus "will slay (the beast) with the breath of His mouth" when He returns. So it seems the beast will run his course through the tribulation before Jesus return to get the church.