Will Smith was wrong.
As was Chris Rock.
Was there a more wrong?
Yes, Will Smith. Period.
He's an adult, and has every opportunity and every responsibility that goes along with that. He didn't have to like it, but a comedian making a joke, and often a bad joke, is not only typical, but may be considered a huge part of the job. Insulting others is the norm. But, Smith had this huge chance to really make a statement about what his wife is going through and expressing to Rock in firm words at a more appropriate time, or even during his acceptance speech.
The joke was funny. It WAS funny. Inappropriate, but funny. Like any number of similar jokes throughout history.
But, at this point, the needle really moves against Will Smith. I think for good reason.
I have no belief that it was staged, but it could have been. Such is life. But, at no point do I want me making a bad joke end up with me being physically assaulted. I will return the favor. Even if I don't like what you have to say. I certainly wouldn't like someone the size of Will Smith stepping up on me. That would suck.