"Nazi propaganda was fairly effective in rallying the German masses but it was a flop in most other countries and cultures"

I think this is a very important observation that deserves further study. One german poster online mentions his grandma that said: "Don't believe the people that say the Nazi propaganda was very convincing. Even as a teenager I could tell it's crap and never believed one word of it."

It would be an interesting historical exploration of the Nazis that tries to unemotionally find the human needs/desires/vices that were satisfied so well by the feeling of belonging to a genocidal group. Yes, I know that comparisons to today are very natural and they might be even useful, IF there was ever a country that got denazified without first being defeated and starved first.