Hurt people hurt people. Often, racists and bigots come from abusive families, and their lack of awareness of their own trauma condemned them to continue the cycle.

See Dr. Ramani, Professor of Psychology at California State University, talks about the link between narcissism and racism: https://www.youtube.com/watch?v=4aZKNck6LDE&t=983s

Narcissist and bigots are low self-worth people that believe they will lose if the rules of the game is fair for all.