The F, B and Germans might have killed millions in Africa, but the American conquest of the West was different.
American built cities and killed the natives and started farms and introduced cattle and crops, while the Europeans mostly kept to a few strategic towns and cities and did neither.
Hitler was a big fan of American stories, just like Stalin loved westerns.
I'm just talking about the tactics the Nazis use and the work camps. Huge inspiration from Belgian Congo, Madagascar "tache d'huile" tactics and the German Mozambican work camps into genocide around WW1.
Concentration camps were not a new invention that only appeared w/ the Belgian Congo etc.
Mining operations for example in the Roman times were hardly any different, thousands if not more died in equally horrible conditions. The construction of the buildings and the mechanim may have changed but the results were the same.
American built cities and killed the natives and started farms and introduced cattle and crops, while the Europeans mostly kept to a few strategic towns and cities and did neither.
Hitler was a big fan of American stories, just like Stalin loved westerns.