neb:
Sideface:
This history highlights how the real risk to American democracy came hours after order had been restored in the U.S. Capitol [..]
It's actually a lot less clear than that. Germany in the 1920s had no experience with democracy, only centuries of being drilled with obedience to authority. There had been several minor civil wars in different states a few years earlier, which led to left-wing governments being suppressed by right-wing reactionary forces, mostly Freikorps, implicitly encouraged and supported by the Entente Powers who didn't want Bolshevist governments in the German states.
Hitler's home state had been the Bavarian Soviet Republic only a few years beforehand. The left and right held regular pitched street battles, not so much over politics but more in the sense of football hooligans in the UK, something to fight about. Some of these battles, e.g. the Altona Bloody Sunday, were used as pretexts for things like the coup whereby the government of the largest German state, Prussia, was swept aside.
The lack of the authoritarian leadership that they were used to combined with the weakness of this newfangled democracy thing was what helped bring Hitler to power. The US today is a very different environment to 1920s/early-1930s Germany.
Remember the Beer Hall putsch failed and Hitler got a slap in the wrist sentence (judiciary was full of people who felt like him). He spent a few months in jail, where he wrote his book. Fifteen years later he was "Fuhrer".
America could very well have a Don Jr in power in fifteen years. Not the Orange man himself but someone who carries his "flag".