“I can only imagine that the problem is that many in Germany continued to support the policies of the Nazis long after the end of the war.”
Why do you suppose that it remains necessary to ban the NSDAP, to have a court continuously in session to ferret out and ban organizations and groups that print or discuss NSDAP ideas or create symbols or music that could be understood to relate to the NSDAP?
It remains necessary because they are damned afraid of the ghost of the Austrian corporal.
And well they should be. His ideas and his program, except (possibly) the antisemitism, fit the German psyche quite well.
I believe it only remains “necessary” because the international Left wants a bogeyman to scare off any argument against it’s policies. I readily understand why the Germans ban everything OUTWARDLY Nazi. The problem is that to the German and International Left ANYTHING CONSERVATIVE IS DEEMED NAZI.