It’s kind of funny since before the Nazis, Communists were the original archetype of a violent fringe political movement that had lots of people murdered for no good reason. People were terrified of Communists and resolutely devoted themselves to making sure to stop Communism as fervently as possible, by any means necessary. Considering the millions of people murdered by Communists this is even a completely understandable and justifiable impulse. This is exactly why the Nazis exploited this fear.
