I'm no history expert, but I'm pretty sure that things in the US are not even remotely as bad as they were for Germany in the 20s.
Well if you listen to the rhetoric from the activists...
The Nazis claimed that the politicians and the banks are corrupt, working for their own profit instead for the benefit of THE PEOPLE.
They also claimed that the majority of the Germans demands a government that works for the people, not for big business, and that the majority of THE PEOPLE standing behind Hitler, a strong leader who works for THE PEOPLE.
So I'm a little bit sacred if a large group of persons claim they are representing 99% of THE PEOPLE... that left not much room for dissidents.
Could become pretty nasty, for the remaining 1% or those who are declared to be that 1% ( did they have a name for them yet, like "Enemies of THE PEOPLE ?"

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A lot of the early Nazi-Propaganda was very anti capitalistic.
During the 90s a lot of discussion was going around inside the left Scene in Germany about the dangers of simplified anti-capitalism as a fuel for a right - or left - populist movement.
One signal for that simplified anti-capitalism is the use of moralistic rhetoric like "greedy banksters" . This critic doesn't target the economic rules of capitalism, it targets a person as moral inferior.
It's like calling a prostitute "slutty" and don't try to understand the economic background that is forcing her to sell her body.
While this simplified critic won't help you to understand or solve a problem, it gives you the good feeling to be moral superior compared to the greedy bankster or the slutty prostitute.
And isn't that feeling good enough ?