25% of what we call "racism" is crybabies needing an excuse to cover their own inadequacies. That goes for "reverse-racism" also.
25% of "racism" is peer pressure. "Birds of a feather flock together", basically.
Another 25% of racism isn't racial at all - it's YOU'RE AN a-hole! NOBODY likes you.
The last 25% of racism is racism, pure and simple. And usually that's pure ignorance. Daddy and Mommy were racists, and the next generation never breaks away from that indoctrination.
If you start by assuming humans are no different than chimpanzees, it all makes sense. If you start out expecting humans to be better than chimpanzees, you're just setting yourself up to be enraged by human behavior. That is the sum lesson of my life's experience with humans, and I've been around the block a few times.