> “Racism” as the word is generally accepted refers to skin color. It has nothing to do with culture.

No idea how you came to that conclusion. There are many counterexamples to this claim.

It’s not racism when, for example, some Koreans discriminate against each other on the basis of skin tone. It was racism when some Hutu did pogroms against the Tutsi.

I agree with mulling. Give up these language-games and just admit that you can’t be a culture realist without also indulging in a little race science.