The way the Nazis bent their own history to make it seem like Germany was always this unified nation is remarkably inaccurate. According to Nazi propagandists, Germany was promoted as a congruent history of one nation. When in reality the area known as Germany in the modern sense, was a collection of states/tribes before being unified under Prussian leadership in 1871. And nobody talks about how Prussia controlled many parts of German territory. It's kind of amazing that they convinced the German population that Nazi Germany somehow previously owned most of Western Europe and therefore entitled to take what is rightfully theirs. They also convinced them that Russia and Germany weren't ethnically connected at all.
And it's also unreal that they convinced so many ethnic Slavs living in Germany that they weren't Slavic but German and to hate other Slavs.

What a convoluted and head spinning retelling/revising of history.

And the worst part is that modern neo Nazis repeat these fallacies.