Indeed, that's demonstrably nonsense.
Through good fortune, bullying and some expert political gamesmanship, within a 4-year period Hitler had managed to get a Nazi into every single major political post in Germany - it became literally impossible to stand up to him. Plus half - or more - of the population had no idea about the camps etc. until it was way too late to do anything about politically.
( Monty Boyce, My cheese game is strong, Wed 20 Apr 2011, 17:39, Reply)