I felt that was more vile racism than anything I have ever heard come out of Trump's mouth. I was appalled by the blatant racism that would have to thoroughly permeate your world view to allow you to proudly say something like that.

But, at the same time, Biden doesn't think he's racist. I believe that he truly despises racism. He's just got himself tied up into conceptual knots and self-contradictory values and beliefs, and rationalizations that he doesn't want to examine too closely. I don't think that's uncommon among academics and intelligent people in general.