You keep saying it, but you haven't provided any scripture which plainly says believers will be raptured before the Tribulation
The only way you can draw that conclusion is if you have a preconceived notion of a PreTrib rapture.
1Th 4:14 for if we believe that Jesus died and rose again, so also God those asleep through Jesus he will bring with him,
1Th 4:15 for this to you we say in the word of the Lord, that we who are living--who do remain over to the presence of the Lord--may not precede those asleep,
1Th 4:16 because the Lord himself, in a shout, in the voice of a chief-messenger, and in the trump of God, shall come down from heaven, and the dead in Christ shall rise first,
1Th 4:17 then we who are living, who are remaining over, together with them shall be caught away in clouds to meet the Lord in air, and so always with the Lord we shall be;
1Th 4:18 so, then, comfort ye one another in these words.
--Jesus comes to the clouds; not to the Mount of Olives (Zech.14:1-4).
He comes invisibly; not in spledor and glory with his holy angels.
He comes for his saints; not to take vengeance on those that believe not the gospel (1Thes.1:7-9).
He comes for to take the saints to heaven; not to deliver the Jews on earth. (Young's Literal Trans.)
--The two comings are so different they cannot be reconciled. This coming is the rapture and it takes place before the Tribulation. Therefore Paul comforts the saints at Thessalonica with these words. It is comorting to know one is not going to face the wrath of God in the Tribulation.
2Th 2:1 Now we beseech you, brethren, by the coming of our Lord Jesus Christ, and by our gathering together unto him,
--We will be gathered together with him when the Lord comes, but the time is not now. It is still in the future. Certain events must happen first.
2Th 2:2 That ye be not soon shaken in mind, or be troubled, neither by spirit, nor by word, nor by letter as from us, as that the day of Christ is at hand.
--Make note, His coming is immanent. It always has been. If it were after the Tribulation it would not be immanent. For the Tribulation lasts seven years.
2Th 2:3 Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition;
Before he comes there shall be a "falling away."
According to secular sources there are over one billion "Christians" today.
Of that one billion that profess the name of Christ maybe 1% are actually saved. See the thread on "Christian."
Have you ever read the testimony of Charles Templeton? He started out as an evangelist with Billy Graham. He says he doen't beleive in God now.
The public school system won't allow a school teacher to put a Bible on her desk; but they will allow another teacher to be openly gay. Our society is anti-christ.
Then the man of sin will be revealed, the son of perdition. This is the antichrist.
2Th 2:4 Who opposeth and exalteth himself above all that is called God, or that is worshipped; so that he as God sitteth in the temple of God, shewing himself that he is God.
--He will sit in the Temple of God and proclaim himself as God.
2Th 2:5 Remember ye not, that, when I was yet with you, I told you these things?
2Th 2:6 And now ye know what withholdeth that he might be revealed in his time.
--Paul had already taught them these things.
Verse 6 in the ESV says:
2Th 2:6 And you know what is restraining him now so that he may be revealed in his time.
That restraining influence is the Holy Spirit. It is the believers presence. They are the light of the world, the salt of the earth. They are the only ones that are holding back wickedness in all of its ugly form to totally permeate this world. That restraiing influence will be removed. That is the rapture.
2Th 2:7 For the mystery of lawlessness is already at work. Only he who now restrains it will do so until he is out of the way.
2Th 2:8 And then the lawless one will be revealed, whom the Lord Jesus will kill with the breath of his mouth and bring to nothing by the appearance of his coming.
--Satan is at work now. Evil is rampant now. See Iraq and ISIS, and Hamas. When the Holy Spirit is taken out of the way (the rapture), then the Antichrist will be fully revealed. Eventually he will be killed by the Lord Jesus Christ (after seven years).
2Th 2:9 Even him, whose coming is after the working of Satan with all power and signs and lying wonders,
2Th 2:10 And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved.
2Th 2:11 And for this cause God shall send them strong delusion, that they should believe a lie:
--The coming of the Antichrist will work miracles with the power of Satan. He will show power, signs and lying wonders.
--He will deceive the unsaved that indeed they will perish. They don't love the truth (no believers in the Tribulation). God shall send them a strong delusion (that the Antichrist is God).
2Th 2:12 That they all might be damned who believed not the truth, but had pleasure in unrighteousness.
--Therefore they shall all be damned because they will follow that lie. They will not believe the truth.
2Th 2:13 But we are bound to give thanks alway to God for you, brethren beloved of the Lord, because God hath from the beginning chosen you to salvation through sanctification of the Spirit and belief of the truth:
2Th 2:14 Whereunto he called you by our gospel, to the obtaining of the glory of our Lord Jesus Christ.
--Paul thanks the Lord for these believers. They will not face any of this, for they will be raptured before the Antichrist appears on the scene. He already explained that to them in 1Thes.4:13-18.
To them all these are words of comfort, not fear. To the unsaved they would be words are fear, not the saved. The saved won't be there:
2Th 2:16 Now our Lord Jesus Christ himself, and God, even our Father, which hath loved us, and hath given us everlasting consolation and good hope through grace,
2Th 2:17 Comfort your hearts, and stablish you in every good word and work.