Comment by reissbaker

I mean, racism is a fairly fuzzy term and not based on hard science; plenty of people refer to the condition of Palestinians in Israel as "racism" (or in fact do use the word "apartheid"), but to invert what you're saying here — they can just convert to Judaism [1], so should the term apply? Anyway, regardless of whether we want to call it racism, Muslim societies were definitely anti-Semitic.

1: E.g. this man who actually did convert, immigrated to Israel, and then was jailed and beaten by the PA when he tried to visit his family in the West Bank https://www.timesofisrael.com/palestinian-convert-to-judaism...