I think it’s a real stretch to compare Trump to Hitler. I don’t think Trump hates any one group of people enough to exterminate them. Even the Muslims and the Mexicans. I think he’s a narcissistic pathologically-lying businessman who’s gotten in over his head. I am, however, questioning the people he’s appointing to his cabinet.
And doing things like this. I don’t think it’s really him, per se, but the people in his transition team. Hence the questions. You know what moves like this one is reminiscent of? World War II. When Germany invaded Poland in 1939, they gathered all of the university professors (and doctors, and lawyers, etc) and publicly executed them, or sent them to concentration camps to die. Their goal was to get rid of the Intelligentsia of Poland.

The courtyard at Jagiellonian University in Krakow where the intelligentsia where rounded up before being executed.
I feel like what’s happening in the energy department is akin to that. They are trying to find out who opposes them and who needs to be gotten rid of (fired, not executed this time) when the regime takes powers.
And that’s some scary shit.
U.S. Energy Department balks at Trump request for names on climate change