What was the Nazis’ Aryan-superiority theory?

Adolf Hitler, the Chancellor of Germany and the leader of the Nazi party was of the opinion that the Aryan race was superior in the racial hierarchy. Germans and north European people belonged to this class. So, they always expressed their hatred towards other races, especially the black African Americans. According to the Nazi ideology no man from other races could defeat the Aryans in any way, be it war, sports or intellectual capacity.

According to the Nazis, they were superior.