We Are Looking for the Rapture, not the Antichrist

I found a concise summary of this topic.

Paul's second epistle to the Thessalonians was written as a response to a query that church had sent to the Apostle. The Thessalonians were troubled by a letter they had received, purportedly from Paul (but actually a forgery), alleging that they had entered into "the day of the LORD" (2 Thessalonians 2:2). They were troubled by this since Paul had previously taught them that the rapture of the Church would happen before the outpouring of God's wrath during the Tribulation period (1 Thessalonians 4:13-5:9); if this allegation...

You can read the rest here: Not Apostasy, but Rapture!