Delusion seems awfully important to them
For the mystery of lawlessness is already at work... the lawless one will be revealed, whom the Lord will... destroy with the brightness of His coming. The coming of the lawless one is according to the working of Satan, with all power, signs, and lying wonders, and with all unrighteous deception among those who perish, because they did not receive the love of the truth, that they might be saved. And for this reason God will send them strong delusion, that they should believe the lie, that they all may be condemned who did not believe the truth but had pleasure in unrighteousness.—2 Thessalonians 2:7-12 (NKJV – condensed)