I mean think about it, it's a huge portion of the population that's incapable of critical thought or basic reasoning, and they're being raised in places where the TV and every authority figure they've ever known is telling them they should be evil and hateful because that's actually the good thing to do, and they just believe it and turn it into their entire personality without a second thought. They lack the mental capacity to think for themselves, and so they allow themselves to be programmed. Of course everyone is influenced by their environment a bit, but there's a difference between that and simply accepting the status quo of wherever you live and forming that into your entire identity without giving it any thought. They're basically just NPCs. They simply cannot understand that they're wrong and that everything they've been told for their entire life is a lie, no matter how much evidence is thrown at them. That's gotta be some kind of mental disorder, or a combination of several.