Hitler and the Nazis became known for their violent fights with the Communists in the streets and their poorly-planned Putsch in the early 20s.
Not coincidentally, the Communist street fighters were called "Antifascists" - Antifa for short - and they had the same flag as our masked marvels today.
German democracy was overthrown by Leftist thugs fighting Communist thugs and only too late did Germany discover that neither side was any good for them.
it was a fight between collectivists for power
germany was screwed either way