Indeed.
The thing about Nazis: A Warning from History is not that it is just about the holocaust, nor is anyone saying the US is currently like 1939's Germany.
However, what it does is slowly and carefully examines and exposes exactly how a fairly normal western democracy descended within a few years, with the acceptance and agreement of its population, into the horrors of fascism.
The lesson being, if it happened then and there, it could happen now, if the lessons are not learned, and the warnings are not heeded.
The US is on that path right now, and the lessons have been forgotten, and the warnings are being ignored.