The Three Angels Messages - God's Final Warning to the World, page-17

If you're not a pre-trib then the following will be just noise to you.
Was v3 mentioned in the quote I listed ? No.
""Paul warned that those who teach the Church will go through the Tribulation were false teachers (2 Thessalonians 2.1-2)."""
2 Thess 2:1-2
1. Now we beseech you, brethren, by the coming of our Lord Jesus Christ, and by our gathering together unto him,
2 That 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.
..
""" the Church """ Gal 3:28, Col 3:11 - believers TODAY.
"""by the coming of our Lord Jesus Christ, and by our gathering together unto him""-- pretrib rapture.
"""the day of Christ"" -- 7 year tribulation.
"""not soon shaken in mind, or be troubled, neither by spirit, nor by word, nor by letter as from us """""
by the false teachers/teachings appearing (as) to be the teachings of Paul but are not.