UT has to protect the basketball program and the only way to do that was to fire Pearl. It's not like they're doing this for no apparent reason. Why wasn't everyone this upset when the possibility of him being fired was first mentioned last year?
Most people are upset because they don't like following a loser, even if said loser team belongs to "your university". They didn't follow until we started winning consistently. Said fans are also probably the same ones who stopped going to football games after Fulmer's last stand.