Chris made a joke about Jada looking like GI Jane because her hair is short due to alopecia
Chris' joke was in very, very poor taste so I do understand why Will was upset. However, going up there and punching him was incredibly unnecessary. If you had an issue with it, there are ways to hand
Chris shouldn't have been on that stage in the first place, considering that time he turned a bunch of kids into the butt of a lazy joke based on racial stereotypes in 2016.