I'm not going into depth about the major differences to the Weimar Republic which will make a similar outcome unlikely (sadly?), but if you are so vehemently opposed to a comparison with the nazis, then just compare it to Stalin. Or Castro. Or any other leftist (or anybody at that) who instrumentalized extrajudicial violence and then ended up in power - they are then all eager to suppress that, as they are not interested in instability anymore, but in stability. It's really always the same, no matter the side. It's just a logical consequence. You prefer to compare it to the bolshevics, fine - had they won the election in Germany back then, they would've done the same.