One thing that has always baffled me is, why did the Germans follow a man who was not a German by birth but who promoted the racial superiority of the German people? Adolf Hitler was an Austrian by birth and for a few years he was a stateless man living in Germany.
this answer from u/kiekieslowskifan might interest you. It is important to note that, while we tend to think of “German” as a nationality today, it is actually an ethnicity found in several countries besides Germany.