I understand the historical background. Probably better than you. I read Rise and Fall of the Third Reich at 11 and much more since.
You seem to think that unless the current situation is exactly like some other situation that there is no need for concern?
Whatever
There is ample need for concern - hollowing out institutions and agencies, for instance, or the demise of the GOP as a political party with a moral core under Trump's "leadership". We've been talking about that, and lots more, and thus you are grotesquely misrepresenting my argument. The issue was, "Is Trump like Hitler"?
As to "historical background":
"He is
only 'unlike Hitler' because of incompetence and lack of coherent strategy[, not for lack of trying.]"
That demonstrates a complete lack of historical background, and a short look at Trump's history and the comparison with Hitler's demonstrates conclusively, there is a lack of trying, a lack of means, and obstacles Trump is very, very unlikely to overcome.
Why is all that important? We observe, currently, U.S. institutions starting to work to reign in a corrupt president. If he is Hitler, he'll squash it all, dismiss or emasculate Congress, and place himself above the law. If he's not doing any of that, if Congress prevails in the form of impeaching him, if his corrupt underlings go to prison, if the rule of law is upheld and an opposition party works to guarantee this remains so, there's hope for a repaired and restored U.S. of A. In the opposite case, there is very little, if any.
Those screeching "Trump is like Hitler" are going to be dismissed as hysterical goofs, and they are merely a distraction from the task at hand, which is monumental, but, as it seems right now, feasible. But that takes focus, and sober analysis, along with some spine and stamina.