To compare Trump to Hitler is just plain hateful. I suppose you laughed at the vile and nasty Kathy Griffin's severed head of Trump. Your position is just like hers.
Regarding German immigrants to the US, may I remind you that the best came to America after the war because they didn't want to wind up in the Soviet Union. While they did contribute to America, it was America that gave them freedom as it did the European children, parents and grandparents of those who stayed and who now post here. You could be sure if Russia started to move into Eastern Europe, Macron and Merkel would be the first to call Trump begging him to help them.
Alan, I agree that comparing Trump to Hitler would be hateful.
However, that's not what Bernard is saying. He is pointing out the state of the Nazi Germany after their people democatically elected Hitler. Some scientists, engineers, professors, and doctors saw the early signs of a dictatorial state with an evil agenda (after all "Deutschland Uber Alles" is not so different from "America First" slogan), and left Germany even before the start of the war. Also many artists and writers after witnessing anti-semitic propaganda, witch hunts and suppression of democracy had their worst premonitions and fled the country. Unfortunately, not everybody was able to escape. And while it is true that some of those brights minds arrived to USA only after the war, it was due also to the fact that emmigration for many of them was often not possible before and during the war.
When two of Trump's most prominent industry advisors (Elon Musk and Rober Igers) quit as his advisors, that's not so different as when some of the scientists in Nazi Germany left the country rather than working in such a state.
Goebbels proved to be an expert in his mastery of the dark art of propaganda and he implemented what Adolf Hitler wrote in ‘Mein Kampf’ with regards to the truth: if you are going to tell a lie, tell a big one and if you tell if often enough, people will begin to believe it. Allegedly, Trump kept a copy of that book by his bedside, and indeed he keeps telling small and big lies all the time.