You must have fail to read the material I direct you at.  I will just provide a quote here

May, who had never been to America, invented a hero named Old Shatterhand, a white man who always won his battles with Native Americans, defeating his enemies through sheer will power and bravery. Young Hitler read and re-read every one of May's books about Old Shatterhand, totaling more than 70 novels. He continued to read them even as Führer. During the German attack on the Soviet Union he sometimes referred to the Russians as Redskins and ordered his officers to carry May's books about fighting Indians.

I think that this is notable enough for a brief metion on the page.  It helps the reader to get inside his head, especially when he then goes off an kills 50 million people.