They didn't invent it, but there is an old video where some commie suggests calling anyone who challenges Communism a racist, sexist etc (basically the thought-killing slur du jour, nowdays it's far-right™) in order to deflect and turn the conversation around and never actually get to the part where their vile ideology is challenged.

Hirschfeld, communist jew that besides that book was also doing sexual experiments which even today would land him in jail: https://www.amerika.org/texts/the-origins-of-%E2%80%98racism%E2%80%99-the-curious-beginnings-of-a-useless-word-samuel-francis/

That word was exclusively created as attack word against native europeans, still used that way today by the same religious and political groups.