When this first popped off I didn't know what people were talking about & went to look it up, but it hadn't made the news yet & so instead I found a bunch of articles talking about this moment earlier, when an actress made jokes about their open marriage:
A Very Single Regina Hall Uses Oscars To Find A Boyfriend, Pats Down Jason Momoa
“Will Smith. You’re married, but ... You know what, you’re on the list and it looks like Jada approved you, so you get on up here!” Hall said, alluding to the couple’s open marriage.
That seems more insulting than a GI Jane crack & my dimestore psychoanalysis is that Will stomached his rage over all of the collective insults he took as personal until he saw the opportunity to take it out on an older, smaller dude AND use Jada's 'honor' as some kind of excuse.