I once left my car parked in DC because of work, in a primarily Black neighborhood. Not a particularly bad neighborhood visually, but anyways. I was coming from school and had my backpack in the back seat. I'd forgotten I had it and went off to work. Long story short, I came back after work and found my window smashed, my backpack gone with about a grand in tech as well as multiple soon to be due HW assignments gone along with it. I didn't say anything aloud, but you can bet your ass I was screaming some not-nice profanities mentally. Nevermind that I had no proof it was a Black person. Several weeks later I was over it, if sore about the dent in my bank account. No lingering hostility towards Black people, because I'm not dumb enough to think one petty crime represents an entire group of people. I instead got a life lesson in why we can't leave our nice things out in the open.
Is that how lifelong racists are born? They get in a similar situation, but rather than get past their moment of rage and generalization, they latch on to that and run with it? Then slap on a whole bunch of heresy, conspiracy theories, and Fox News? Oh who am I kidding, that's exactly how it goes.