This is a Black apparently doing this to a White (correct?) so it's no surprise at all. If it was the other way around, the White would be kicked out of the sport, fined, career over, life in public over, and countless death threats...It goes without saying that Blacks probably thought it was "cool".
Wow that is messed up. That guy should be banned. On a side note that was a weird KO. Looked like the white guy kicked his leg out and was going to do some ground and pound on him, then was suddenly unconscious. It looked like he may have taken a knee on the way down.