One of the greatest lies we in Germany tell ourselves and everyone else about our post-WW2 is the tale of “denazification”: that we somehow removed of all the politicians, bureaucrats, teachers, police officers and other officials from their positions that made the cruel machine of Nazi Germany work.
Turns out it was quite hard for the Allies to implement a new government without people who have experience in those roles and the local language, so a lot of them just got to continue with more or less the same jobs after the big figures were trialed in Nürnberg.
We let Nazi ideology fester and grow over decades while painting ourselves as a nation that had “learned from is past”. What we really had learned was how to keep up appearances. A facade of a liberal democracy while under the covers resentment about the lost war and nostalgia about the Nazi era could spread to this day.