Especially given the marginal intelligence/ethics/morality of those who practice/promote such.
I know some genuinely intelligent people who are convinced it is their ethical duty and moral obligation to be superior to anyone of color or whose primary language is Spanish. Racism is not a function of intelligence, ethics, or morality
. Rather it is a function of ignorance and fear. Ignorance of anything or anyone outside of their narrowly constrained lives and fear of their own ability to compete and succeed in a world where their kind
are not in control and can subjegate anyone and everyone who thinks, acts, or looks "different." Skin color is a convenient and highly visible means of determining "difference."
If you don't believe intelligent people can be ignorant there are a number of otherwise intelligent politicians who apparently take great pride in their ignorance of science. One was just elected President.
Neither is racism regional. It has been said that in the North they love the race but hate the individual while in the South they hate the race but love the individual. I'm not sure which is the more egregious because in the final analysis the result is equally destructive.