It's not a liberal conspiracy and it's really insulting to pretend like millions of Americans who report being subject to prejudice on a frequent basis are delusional because most Americans are embarrassed by their racial biases.
In my experience in the SE, most individuals themselves aren't directly racist to any other given individual of color (aside from very specific stereotypes), but they propagate racism through their actions/policies they support/group think with others who feel similarly.
I doubt you meant it that way, but this translated in my head to "they're racist because they're conservatives". Would you mind clarifying?
Diversity is a social problem not a cause for celebration IMHO. Is it wrong to want this?