There's so many incorrect things here. So I guess since you're taking it serious I'll respond.
Hitler didn't run on the idea that Jews should be removed and killed. And the action taken by himself and the SS was something that is incomparable to taxation in the United States. Taxes are approved by congress, but the President and his military force. Hitler used his executive power to kill those deemed unworthy.
Bernie Sanders and most Democrats, run on the idea that they want to pay for a new 'gimmedat,' people have the ability to vote against that opinion. Which is basically all what elections are. Removing or adding gimmedats, but then bullshit people like Milo and apparently you now conflate adding gimmedats with authoritarian regimes because....maybe they're dumb? I guess.
So are the German people somewhat responsible for the genocide? I wouldn't agree, since it was not his platform to commit genocide. I don't even think Hitler had a majority anyways.
What's the last tax/gimmedat to win without a majority in this country?
As far as Hitler specifics go (and this is
@Black Orifice as well):
Dirty backroom dealing: Standard politics.
Not fully revealing the details of policy/platform: Standard politics.
Not full majority: Standard democratic politics.
Hitler's views regarding Jews were known via Mein Kampf, and there was no significant pushback even in the early 1930s to the immediate implementation of pogrom(s) and "special status" treatment. Antisemitism in Europe in general has waxed and waned over the centuries as they have been regular non-assimilators in whatever host country - and anti-semitism was waxing at the time.
Defending the Weimar Republic as a socialist project vs the horrors of dirty right wing takeover is a pretty amusing position take in defense of socialism, since the WR died via hyperinflation trying to serve both
reparation and socialist projects. I guess that's the death Berniebros wish for the US. If we ignore the moral issues with the Jewish pogroms and the treatment of non-Germans in the expanded
lebensraum, the rightwing coup was a smashing success in comparison to WR deathonomics. Only the US engagement and the timing/overruning of the Eastern Front prevented it from achieving all objectives, at least in the short term.
As far as gimmedats in the US go, before I go any further I want you to clarify whether it is simply the current political/legal system you are leaning on for justification of any gimmedats, or "majority rule". I can't properly deal with the problems in either area unless I know on which pillar you are resting.