Your attempt at trying to connect Christian belief in God’s salvation of sinners from sin and back into loyalty with God under the headship of Christ, with the apostasy of the antichrist, has spectacularly failed every time you’ve attempted it, Aaron. Are you sure you want to go this route again?
Because the antichrist, who opposes and exalts himself above all that is called ‘god’ and above every object of worship, so that he takes his seat in the temple of God, displaying himself as being the God (which is the kind of apostasy Paul was talking about at 2 Thess 2:3-4), would be (quite literally) just about the last person (except maybe Satan) who would go around encouraging people to believe that God in Christ, through the blood of His cross, does and shall reconcile all things to Himself, whether those things are in the heaven or on the earth. No rebel against God would seriously teach that all rebels against God shall eventually, thanks to God, cease rebelling, repent of their sins, and become loyal servants of God again (in many cases after having been punished by God).