The heroic SPD, who shoveled two million conscripts to their deaths in the pointless meat grinder of WWI (which killed 20 million, all told)
Yep, 100% accurate (and, a roughly-accurate analogy I think with modern Democrats doing insane things like supporting Israel)
and violently suppressed opposition to it
Er... which suppression are you talking about? I'm a little out of my depth on it but the only suppression I'm aware of came after the KPD started a violent rebellion against them. But like I say I'm not that well aware of it, can you tell me?
By the way, the 1932 German Presidential election had three candidates: the nefarious communist candidate Ernst Thälmann, Adolf Hitler, and Paul von Hindenburg. The winner was not Hitler, it was Hindenburg, who then proceeded to appoint Hitler as chancellor.
Once he won his 1932 term Hindenburg had Brüning as chancellor, then Papen, then Schleicher, amid a massive amount of infighting, and then after all that was Hitler. The vague picture I have is that infighting including but not limited to KPD vs. everyone else, strikes, street battles, and general chaos was a big part of what was making German politics nonfunctional and created the conditions where Hindenburg eventually had to work with Hitler.
Certainly the moderates in the Reichstag had to work with either the KPD or the Nazis, numerically, in order to get anything done, since none of those three factions had a majority. I'm out of my depth to say exactly how it played out or whose fault it all was. But I'm pretty confident in saying that "Hindenburg was secretly Hitler-friendly and got behind him instantly as soon as he was in office" is oversimplified, if that's what you're saying. For one thing, he'd been in office already for 7 years before that, and he had to die before the Nazis actually took over -- it doesn't seem to me like him in office was the key to Nazi takeover.
Would it have turned out different if it was 64% Hindenburg, instead of 51% Hindenburg and 13% Thälmann? And likewise with loyalties in the Reichstag? I'm sort of implying that it might have, but honestly I have no idea. And I likewise have no idea whose "fault" it was between the SPD and KPD that they were both pretty consistently at each other's throats. I just know that part of the way it played out was rabid opposition to Hindenburg and the SPD from the left, rather than unification from them as the only alternative to Hitler, and that against that backdrop Hitler was able to make it work.
Obviously, the lesson to take away from this is that the people who tried to stop both world wars were on the wrong side of history, and the people who supported the guy who appointed Hitler chancellor in order to stop him from coming to power were right about everything and worthy of emulation.
I didn't say they were on the wrong side of history, and I don't think they were. I do think that their treatment of the SPD as "the real enemy", and pursuit of "what we want in a perfect world" with no attention to "what's the best outcome we can actually achieve" or "what will be the actual real outcome of chasing our perfect vision" is, in my opinion, part of what let Hitler come to power and got most of them killed a couple years later.
Some Republican Secretaries of State, Mike Pence, military leaders, conservatives in the Justice Department, and similar not-real-inspiring-politically people were some of the most important ones who put the brakes on Trump's previous attempt at a for-real fascist takeover. Without them, I think there is an excellent chance that it would have worked, and we'd be currently living in a society which doesn't have functioning elections or protections for political speech in media or on the internet.
I do understand that our elections and our media right now are not fully free. But that doesn't mean every point on that spectrum is the same. People on the left sometimes like to say Reagan or Bush or Trump 1 or Obama or Biden are so oppressive that it all might as well be fascism, but people who lived through real totalitarian rule further down on the spectrum would tell you that no, no it is certainly not.