You joke, but some of them legitimately believe this.

I'm not racist, but... you have to admit a lot of these problems wouldn't exist if the population were racially homogenous. <cites pseudoscience mixed with bad data as "proof.">

Just checked, someone is doing it right here in this thread, supposedly quoting Aristotle.

What they don't realize is that it's them and only them who are bothered by other people. It is they who are personally agitated by others. Their feelings on the topic are all fucked up, and when they run their mouths, it's pure projection.

But they'll never figure out how wrong they are or admit it, they will just keep grasping at rationalizations that make them feel righteous; intellectually squirming around with their fellow idiots and bigots.