I'm guessing you don't know much about the history you speak of. In the 1920's Hitler gained patronage from wealthy capitalists to fund establishment of camps for his "brown shirt militia". He also had plenty of small donors who supported his policies. He used that well funded militia to kill and intimidate Hitler's political opposition, jews and other minority groups. Just like today, right wing assholes went out into the streets armed and under police protection to break up rallies, bust heads and carry out the occasional assassination.
By 1932, opposition to Nazi political power was effectively wiped out, setting the stage for Hitler's final grab for power when he killed off potential rivals within Nazi ranks. re: night of the long knives.
The DHS is pointedly saying armed white supremacist militias are the number one terrorist threat in the US today. It's not the same as the 1920's but history echoes, it does not repeat. That's what I said. Your fantasy of armed protests sounds like an echo from 1920's Germany. We need peaceful protests and if that doesn't work, civil disobedience. We don't need slaughter.