Due to his job, he strives to be impartial and that comes off as anti to the part of the BYU fanbase that has zero-tolerance for anything other than sunshine being blown up their yewts. He gets under the skin of Ute fans too. In other words he drives the thin-skinned of both fan bases crazy. It's all part of his job.
IRL he's a good member of the church, a nice guy, and has nothing against BYU.