Lest we forget: Nazism was an ideology held by the National SOCIALIST German Workers Party(Nationalsozialistische Deutsche Arbeiterpartei. Hardly a Right Wing movement at all. To achieve a leftist's goals, it's perfectly OK to commit genocide to do it.
The commies and fascies were pals until Hitler broke his little pact. Then commie Stalin came out all against mere fascists - because of angry spurned spite. Since commies everywhere worshipped Stalin (including the genuine Reds in the US), they fell for his new-found "hatred" of fascism and ever since claim to be the opposite. They're not; they're all the same ilk.