It's been around since the dawn of time. I'm a little racist myself but I have different beliefs not bad ones. I have black friends btw. the only time I'm ever racist is if someone is being racial to me. Me and my black friends make racist jokes at each other sometimes were not being mean we just joke around to be funny.
Because slavery made people *Whites* Think they owned or were above blacks, & it was just a mutual feeling throughout families even though slavery was done with, the thought process for some reason didn't change.