I didn't see the game and I don't know the details of how he acted. But maybe he reacted poorly in an intense competitive situation. And--let's face it--he was surely provoked to a certain extent.
I'm not going to pretend that BYU players and fans are perfect angels here. I mean, I've acted just as bad in Church ball.
Anyway, he seems like a good kid overall. Making judgements about his character and denouncing him as a "forever enemy" is pretty petty and immature in itself.
He's a young 20-something year-old kid. Get over it.
Flame away.