"...I'm aware of the brutal history of American slavery and segregation and find no humor there."
Douglas Card and Always There: There was no "humor" in what I posted. I was serious.
The brutal history was many decades ago. For how much longer is this society, this country, going shrink, tip-toe, and PC around black/Afro-Americans and their  issues? We must begin to treat them as equals and not as a demographic that is seen by themselves and others as inferior and needing special consideration.
What the U of O instructor did was to wear black face and a white robe to emulate and call to attention a person of color who, despite prejudice, earned his doctor degree, practiced medicine, and then wrote a book about his experience. In the "here and now" there is absolutely nothing about which to be outraged.
If the behavior in black face was in some way demeaning, or promoting stereotypes, then outrage might...might be appropriate.