...cause people to hijack aircraft and fly them into buildings.
...make otherwise good people hope for the end of the world.
...put innocent people to grim deaths for what they think.
...lead people to believe by the millions what only a lunatic would believe on his own.
...perpetuate doctrines that: cultivate the subjugation of women; impose guilt on newborns for transgressions of ancient forebearers; instigate fear of learning and knowledge; and enforce shame of one’s own thoughts, body and species.
How’s THAT for negative social function?