They all hate BYU and very little of it has to do with sports.
I have family members that went to the U - and neither hates BYU. One was my dad when the U was clearly superior, especially since he went to pharmacy school. The other was my brother who probably could have gone to BYU but I think he made some mistake on his application.
My brother was OK for the first year, but now is totally out of the church, but I don't think it is because he went to the U.