A wide variety of Germans, including Karl Liebknecht, Albert Einstein, Albert Schweitzer, and Hitler, loved the May novels. Even today, many young person , notably women, are drawn to Winnetou.
Aping the horrific belief of American Manifest Destiny, which watched the Anglo-Saxon race push its frontier all the way to the Philippines, May imagined indigenous Americans as romantically and inevitably doomed, with Winnetous nobility passing away irrevocably.
Klekih-Petra, another German who flees into the American wilderness, also loves Winnetou and dies with the Apaches. He insures the hopelessness of their struggle!!
https://therussophile.com/the-cowboy-novels-that-inspired-hitler.html