Hitler knew about Black people from the get go..
Strangely enough, he had a higher opinion of AAs than the Jewish community in Germany at the time--he saw us less as a threat. Lawwd
Even more weird, even though some Jewish industrialists contributed/helped finance the rise of Hitler & his Nazi party, he hated their guts. Strange shit!

ALSO, Hitler and his boys were highly influenced by American Jim Crow- they wrote about it.