Fear lead most to their end.

“A Rattlesnake, if cornered will become so angry it will bite itself. That is exactly what the harboring of hate and resentment against others is — a biting of oneself. We think we are harming others in holding these spites and hates, but the deeper harm is to ourselves.”.

E. Stanley Jones

Fear is a feeling induced by perceived danger or threat that occurs in certain types of organisms, which causes a change in metabolic and organ functions and ultimately a change in behavior, such as fleeing, hiding, or freezing from perceived traumatic events.
It’s the reason why some people are racist. They feared what minorities can do and have already done. They fear the difference between them and us and don’t know how to handle us, so they just cast us aside or try to make us disapear.