He's been ejected from one game for throwing a punch at a player this year, had had a personal foul penalty in the game today, and about 15 others this season. The kid is a dirty player. His aggression is part of what makes him so good and probably why he'll end up making a ton of money in the nfl, but it's no surprise to me that he was at the center of this. I agree he was pushed in the back, but it isn't what caused him to push 97. I'm not saying he wasn't justified in going after the Memphis players, but I'm not going to assume the Memphis players weren't justified in going after him.
That being said, the Memphis players who attacked him went way too far and deserved to get trucked by the BYU players. After what they were doing to him I didn't have any issues with what the players did other than nacua's hit.