Exposes an ignorance he has about Nazism. 6 Million Jews were killed in the holocaust. What is less known is another 7 million were killed, among them Black people. Hitler was against anyone who was not Aryan being in his society, which he wanted to incompass the whole of Europe. Much of what he instituted on his acts against those in his country, he learned from Jim Crow South antics against our people.
So, to wonder why Black Americans would have a problem with Hitler, is to be wholy ignorant of history.