fans want to see the Utes fail. It hasn't just been poor fans that have pulled this crap, it goes all the way to the top.
I understand how the Ute fans that grew up while BYU were crushing it felt picked on- because for a long time the Utes were a joke. There were, and always has been some bad BYU fans. But for the most part, BYU as an organization, treated Utah with respect.
Maybe you can come up with some things the BYU organization did that are on the same level of the crap the University of Utah has pulled, but I can't think of one thing.