Yeah, it's unfortunate that he lost it like that. Like MCWTerps said, he's actually an unusually soft-spoken young dude. Hopefully he learned that the best thing to do is to ignore whatever comes his way from the crowd. As good as he was in high school, he probably isn't used to all the negative attention from the other fanbase.
I was happy with Coach Turgeon's actions and post-game comments. Same for Jalen's, although I understand that those who aren't as familiar with him don't believe it was sincere (or even his words)...