We aren't responsible for the mistakes of the past, but we need to acknowledge and accept them in order to build a better future.

That very much depends on whether you think what was done was a mistake or not, doesn't it? This narrative is used to assert the premise in your mind that the new way of thinking is superior and the old way of thinking is inferior. Why? Because it lead to "mistakes" which must be "acknowledged" in the way that a "lesson" must be "learned." The Catholics taught Galileo about a mistake that had to be acknowledged.

I'm going to say something controversial here, but with context below. The Nazis got a lot right. Wait, what? Yes. They opposed globohomo. They demanded decency of behavior and called for a return to the work ethic and social structures which had made German science and industry the envy of the world. These people had been drowned in the depth of Weimar, but within a decade of simply unleashing their people's natural industry, turned themselves into a world class machine capable of imposing their will on all of Europe. They taught their own people after a decade of humiliation and abuse to once again be proud of who they were and where they came from. They had a LOT of things right, and the evidence is there to see. They did in fact, conquer western Europe, and had Hitler not stabbed Russia in the back, he might have held it. Was Nazism a "mistake" in that context?

My grandfather spent time in Hitler's "hospitality," so I'm not inclined to say Nazism was a great thing that should be emulated. It was politically authoritarian, openly discriminatory, and aggressively abusive of its own people according to the whims of a tiny handful of psychopaths. We all know the results. Marxism is always a mistake. It attracts the psychopaths and encourages the sort of abuse that we make horror films about. I do not, nor will I ever support that form of government.

But the point is that if there is an element of nuance, we ought to be capable of discussing it without prejudicing the discussion with the kind of framing you just put forward. MAGA teaches us to be proud of who we are and where we came from. It celebrates patriotism. It promotes the idea of personal responsibility, a tremendous work ethic, civil responsibility, a return to traditional social norms. It's opposed to globohomo. Should I reject all of that because it's associated with Nazis? I've had countless Democrats I know personally tell me yes to all of that with a completely straight face because they bought into that guilt by association argument, accepted the framing, and "learned" (all the wrong lessons) from the "mistake."

Dealing in nuance with an open, unprejudiced mind IS an essential component of the learning from history we're all told we should be doing. When you frame things as "mistakes we must learn from" or call people "science deniers" or "religious fundamentalists," you're preventing honest and open-minded discussion by closing minds before the debate even starts.