They're living in their own information bubbles, and they're deluding themselves to believe in these kind of bullshits. Used to be a conservative just when they decided they're gonna rid all opposing ideology from the world (usually under the disguise of anti-communism), before that I was a kind of a proto-alt-right kid, and they literally believe that moderate liberals are secretly bloodthirsty satanist communists, who will kill all christians.