Both teams have had classless players in their programs throughout the years. (I don't think any honest Sioux fan would argue that Jason Blake was a model for class) Hauser's actions alone do not make the Gopher program classless (although they do reflect poorly on him personally).
Having said that, however, I think Sioux fans are particularly rubbed the wrong way by the Gopher fans, which leads to a general hatred for the Gopher program. Gopher fans like to think that their gloating after Gopher victories is okay because Sioux fans allegedly gloat when the Sioux are winning. I'm not arguing that Sioux fans do not gloat, but I suggest that Gophers fans are generally much worse.
I will write one example in support of my argument. I was at the January game at Mariucci won by the Sioux. I saw many Sioux fans there and all were quite happy after the game. However, I did not see one instance of gloating or disrespect to Gopher fans. I did not even see one Sioux fan say ANYTHING to any Gopher fan in the building. I was also at the Saturday game at Englestad in February. As I'm sure many of the readers on this site are aware, the Gopher fans in attendance were quite vocal after the game. I have vivid memories such as the drunk guy repeatedly shouting at the top of his lungs "We Own This Place!!" and the guys in the Daktronics suite dancing and waving their brooms.
Now I'm not saying there is anything inherently wrong with this behavior, but a Gopher fan shouldn't be surpirsed if behavior such as this fuels a growing resentment on the part of Sioux fans. Furthermore, let's not buy into the moral equivalency argument and just assume that Sioux fans do the same thing after Sioux victories at Mariucci. I've been present for both situations, and believe me, there is a difference.