random person said in post 1:
Will the Holy Spirit be removed before the Man of Sin is revealed?
No.
The restrainer of the Antichrist (2 Thessalonians 2:6-8) could be a powerful, good angel, like the one who will restrain Satan at Jesus' 2nd coming (Revelation 20:1-3). The restrainer can't be the Holy Spirit, because in the future the restrainer will be removed (2 Thessalonians 2:7b), whereas the Holy Spirit can never be removed because he is always omnipresent (Psalms 139:7-10). Similarly, the restrainer can't be the church, or the Holy Spirit in the church, because the church won't be removed (John 17:15,20, Proverbs 10:30), and there are now no believers outside of the church (Ephesians 4:4-5), and now no one can be a believer without the Spirit (Romans 8:9); and the Antichrist will be allowed to physically overcome believers in every nation (Revelation 13:7-10, Revelation 14:12-13, Revelation 20:4-6, Matthew 24:9-13), just as, for example, the Roman emperors and Satan were allowed to physically overcome believers in the first century AD (e.g. Revelation 2:10).
random person said in post 1:
And will the man of sin be revealed before the Rapture?
Yes.
2 Thessalonians 2:3 refers to when an individual man will be revealed (i.e. without any remaining doubt) as being the Antichrist, by his sitting (at least one time) in a future, 3rd Jewish temple in Jerusalem and proclaiming himself God (2 Thessalonians 2:4, Daniel 11:36,31, Matthew 24:15). This is one of the things that has to happen before the future day of Jesus' 2nd coming and the gathering together (rapture) of the church (2 Thessalonians 2:1-8), immediately after the tribulation (Matthew 24:29-31, Revelation 19:7 to 20:6).
random person said in post 1:
(I am a partial Preterist btw).
Note that no man ever sat in the Jewish temple in Jerusalem and proclaimed himself God (2 Thessalonians 2:4, Daniel 11:36,31, cf. Matthew 24:15), just as no man ever fulfilled other detailed references to the Antichrist (the individual-man aspect of the beast) in Revelation 13:4-18, Revelation 16:2-16, Revelation 19:19-21, and 2 Thessalonians 2:8-9. Any mistaken teaching which claims that the Antichrist has already come and gone could be employed in the future by the real Antichrist to fool some Christians into thinking that he isn't the Antichrist.
The Antichrist will fulfill 2 Thessalonians 2:4 after he by force takes control of a future, 3rd Jewish temple in Jerusalem, stops the daily Mosaic animal sacrifices which the ultra-Orthodox Jews will have restarted in front of it, and has the abomination of desolation (possibly a standing, android image of the Antichrist) set up in the holy place (the inner sanctum) of the temple (Daniel 11:31,36, Matthew 24:15).
The Antichrist could then make quite a show of his sitting himself in the temple and declaring himself God (2 Thessalonians 2:4, Daniel 11:36,31). In a television and internet broadcast which will be seen live by the world, he could first be shown entering the temple's most holy place in magnificent golden robes. He could then step up to the Ark of the Covenant (which could have been discovered, and placed in the temple by the Jews), and lift the Mercy Seat off of the Ark, showing the Ark to be empty. He could then look into the camera and say:
"Where is YHWH? He is not here! He is a distant fraud! His power on this earth is as hollow as this empty Ark!" (The Antichrist will utterly revile YHWH: Revelation 13:6, Daniel 11:36.)
Then the Antichrist could raise the Mercy Seat high above his head only to suddenly smash it down violently to the ground, breaking it into pieces. The piped-in sound of crowds roaring with approval could then be heard in the background. Then the Antichrist could place his hands on the Ark and stare into the camera: "WE can do better than this". He could then knock over the Ark and stamp it with his foot, bashing in its side. Two of the Antichrist's followers in robes could then quickly come in and clear away the rubble of the Mercy Seat and the Ark, while 4 more men in robes carry into the temple's most holy place a magnificent golden throne and place it right where the Ark had been before. All the men could then bow down and motion with their arms for the Antichrist to sit on the throne. He could then grandly take his seat upon it.
Glorious symphonic music could then swell as the sound of crowds roaring with approval increases. Then the Antichrist's False Prophet (Revelation 19:20) (who could be an apostate pope) could enter the temple's most holy place and approach the Antichrist carrying a majestic golden crown encrusted with large diamonds and all kinds of precious stones. The Antichrist could take the crown from the pope's hands, and as the Antichrist is placing the crown on his own head, a camera could zoom in on his face as he says: "I AM THAT I AM. I AM YOUR GOD. Worship me, all ye nations of the earth!"
(cf. Revelation 13:8, Daniel 11:36; 2 Thessalonians 2:4)