Oh I agree totally and as someone who'll promote the benefit of learning from History until the cows come home there of course alarming similarities.
But, rationally, there's also a sizeable differences in terms of the tinder, the political situation and the mechanics behind it and perhaps their desired outcome.
Again true, but on the simplest level compare the actions of Trump over his entire presidency and compare them with what Hitler did from '33-37.
You're right about the guardrails standing, however Hitler quite so often blatantly circumvented the guardrails in front of him, with such blatant openness.
Burning the Reichstag... the Purge of Röhm... the list could go on and that's before Treblinka, Sobibor, Auschwitz, the Commando Order, rape, pillaging...
Trump was bad and could have been a lot worse, but in layman's terms Hitler's legacy is 1000x worse than Trump's is - the rest is conjecture.
Let's not lose sight of what happened.