(Abandonment of one’s religious faith) – This verse is also speaking of the Rapture and the Tribulation period (7 years or two 3 ½ periods). The man of sin or son of perdition is the Antichrist. The one restraining him is the Holy Spirit who is inside those who have received Jesus as their Lord and Savior. When Christians are raptured the Holy Spirit is no longer here and the Antichrist is free to establish his kingdom if only for a little while.
2 Thessalonians 2:1-12 NKJV (1) Now, brethren, concerning the coming of our Lord Jesus Christ and our gathering together to Him, we ask you, (2) not to be soon shaken in mind or troubled, either by spirit or by word or by letter, as if from us, as though the day of Christ had come. (3) Let no one deceive you by any means; for that Day will not come unless the falling away comes first, and the man of sin is revealed, the son of perdition, (4) who opposes and exalts himself above all that is called God or that is worshiped, so that he sits as God in the temple of God, showing himself that he is God. (5) Do you not remember that when I was still with you I told you these things? (6) And now you know what is restraining, that he may be revealed in his own time. (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. (8) And then the lawless one will be revealed, whom the Lord will consume with the breath of His mouth and destroy with the brightness of His coming. (9) The coming of the lawless one is according to the working of Satan, with all power, signs, and lying wonders, (10) and with all unrighteous deception among those who perish, because they did not receive the love of the truth, that they might be saved. (11) And for this reason God will send them strong delusion, that they should believe the lie, (12) that they all may be condemned who did not believe the truth but had pleasure in unrighteousness.
Antichrist Emerges – After the “Rapture” The one world leader will now be revealed who is called the Antichrist (Revelation ch 6, He is the rider on the first horse, the first seal, The Conqueror). He is controlled by Satan himself and he will seem to have all the answers for the first 3 1/2 years. He will be made leader of most of the world. Many will worship him as the savior. Jews will think he is the messiah. Muslims will call him the Mahdi who is their savior and will institute a Muslim world where all non Muslims will be killed (Most will be beheaded). He will institute a one world government and financial system where no one will be able to buy or sell unless they take a mark on their right hand or forehead (most likely a chip of some sort). The bible calls this the mark of the beast. Do not take the mark! This will seal your fate in the lake of fire and brimstone.