Utah's players were tying to stop the Haka dance. Many poly players on Utah's team thought it was disrespectful of the actual reason for the dance and tradition of the Haka dance and didn't believe it was appropriate for BYU to do it at all, let alone on Utah's field.

They did not believe it was appropriate for a game. It is supposed to be reserved for something very serious, like literal battle.

These is also the respecting other peoples houses as well.

It was like BYU was the only guest who refused to take off their shoes and tracked mud through their neighbors house.

Utah's players were not just trying to get into it with BYU's players. That would be stupid pre-game. What if they got kicked out and then could not play in the game?

You may want to think before you judge next time.