A real ignorant one yes. Imagine they straight brawled. Two Black celebrities rolling on the ground on stage. It would look terrible. I don't think that's why he didn't hit him, I think he was just in shock but still he did the right thing.
If Will thought that joke was bad, he and his wife will be a joke for the next couple of years. What he did was counterproductive to them personally and to Black people in general if you keep score on that type of thing.
Imagine Will and Chris on stage like:
I don't even want to imagine the fallout from that