Being German I think it's important to point out that possession of Mein Kampf or reading it was never banned, the idea wasn't to hide some evil esoteric secret knowledge from the German people, to a large extent it was a pragmatic decision because the state did not want Neo-Nazis to benefit financially from the sales of Hitlers legacy, so they just held on to the copyright and didn't print it. There are now since 2016 annotated academic versions of it.

Also you have to have a very cartoonish view of people think we're like the Hulk and turn green the moment you come across a copy of Mein Kampf, denazification was a broad cultural project, not a binary thing about one text.

The primary struggle with that book is actually reading it because it's simply horrid. If you wanted to prevent Germans from turning to nationalism you'd probably have taken Thomas Mann's political writings off the shelves.