[Mark17]

The humans left will be exposed to the meanness of him and his fallen angels as never before. don’t you think?

Yes that’s exactly what I think. I think, however that people will still be saved during the tribulation, and since no one can be saved, unless the Spirit draws him, I am thinking the Holy Spirit must be here in some capacity, maybe like He was, in the Old Testament. See you in the OSAS, sola scriptura, pre trib rapture. Did I miss anything? 😀😂🙃🤗
By the way, maybe in the tribulation, many of these Catholics will realize what we have been saying all along, was true, and repent and believe. If they do, better late than never, but they will probably lose their heads over it. Better to be beheaded an lose their heads than lose their souls.

[imardmd1]

think, however that people will still be saved during the tribulation, and since no one can be saved, unless the Spirit draws him, I am thinking the Holy Spirit must be here in some capacity, maybe like He was, in the Old Testament.

Well, there is a different way to look at that. It is my opinion that as the Spirit came from Heaven to Earth as Jesus had foretold at the Last Supper that He, Jesus, a Comforter, when He went to the Father in Heaven, that He would send another Comforter of the same kind, the Spirit of Truth (Jn. 14:16-17; 16:7-8) Who would be with them and in them forever. I believe that when they go away in the Rapture, so would He that came to be in them forever, when they go away with the Spirit that has been in them would stay in them and go away with and in them. It has been He that has been in saved humans that through them has restrained the Devil, and given them the Divine power to help Him do that.

So, keeping that in mind, here is where I get the concept, and so does MHGinTN. You might consult him for a more detailed discussion of the apostasia and what that means. But here's the Scripture passage, with my markups and corrections of it:

2 Thessalonians 2:1-12 (AV):

¹Now we beseech you, brethren, by the coming of our Lord Jesus Christ, and by our gathering together unto him, 
²That 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. 
³Let no man deceive you by any means: for that day shall not come, except there come a falling away^{αποστασια = departure, the rapture} first, and that man of sin be revealed, the son of perdition; 
⁴Who 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. 
⁵Remember ye not, that, when I was yet with you, I told you these things? "
⁶And now ye know what withholdeth that he might be revealed in his time. 
⁷For the mystery of iniquity doth already work: only he^{The Spirit} who now letteth restraineth will let restrain, until he^{The Spirit} be taken out of the way. 
⁸And then shall that Wicked be revealed, whom the Lord shall consume with the spirit of his mouth, and shall destroy with the brightness of his coming: 
⁹Even him, whose coming is after the working of Satan with all power and signs and lying wonders, 
¹⁰And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved. 
¹¹And for this cause God shall send them strong delusion, that they should believe a lie: 
¹²That they all might be damned who believed not the truth, but had pleasure in unrighteousness"

Note that today the meaning of "let" is opposite what it mant in the 1600s, so that change of te word had to be made, as noted. Also, the Greek word in this context means "to depart" rather thab the usual interpretation of the KJV interpreters of "falling away: from The Faith, which is not a correct interpretive bent which they brought into the translation, that it did not have before.

So there, when He that has for centuries, held back Satan from many of the works that he might done, except for the Spirit-filled Christians who called on God and His Spirit to stop the devilish activity. One of the things the Spirit has held back is the revelation of who the Antichist might be or is. So when He is gone out of this sphere with us, the Man of Sin, the Antichrist, then can make his presence known for certain to all the remaining humans on earth, that he could not do before the Rapture.

Another conclusion that I have from reading the above passage, in that context, I do not believe thaat anyone left behind after the Rapture will be convinced or able to exercise a saving faith. Some may possibly live through the Tribulation and be as they were, as unsaved persons under the Kingdom that Jesus establishes on earth after the tribulation, and thus have another chance to receive eternal life and fellowship with Hod through seadfast faith as before the time of Christ, but will not be a part of His Bride, but rather a Friend of Christ like Sanuel or David or John the Baptist, or old Adam and Eve, or Noah. But that state will still be because of one's faith in Jesus as the Master, and willingness to be His subject, not with the ones who after a millennial still rise up against Him.

But that is merely of my interpretation tat might be partially correct, but not necessarily all the way through.