No, because 99% of the time these labels have no basis in reality and those who use these labels don't bother to even try to prove these accusations. They became just fighting words for dehumanization, used without a second thought.

I don't think it could have been said. The Nazis were, from the start, clearly and enthusiastically in favor of violence against their political opponents. Their first attempt at a violent coup happened only a couple years after they were founded.