"I don't like Muslims" is a valid steam review according to Valve

“Muslims” is often used in a racist way to mean brown people, not just refer to a religious group. “Jews” is used in the same way, to refer to an ethnic group as often as a religion.

The two are used by racists in almost the exact same way. “Christians” are mainly white, so racists dont often attack them at all, especailly since a large contingent of the racists are christian.