re: Cultural appropriation....what does this mean?

It's a Marxist term, used by Commies.

It's never "cultural appropriation" when non-Europeans celebrate European holidays with European mythos (like Santa Claus, and St. Patrick's Day).

It's another cultural Marxist term and concept meant to further demonize white people and the West, because that's what the Left seeks to destroy.

Obviously my response is tongue in cheek. Going by the definition, I think it has to be a bit more systemic and broadly affecting. But again, in my initial post I just posted the definition and explained my reservation with the claims.