You have to state something like "I hate the Yewts" Or "The Yewts are acting like a bunch of classless yewts." You are clear that you are talking about University of Utah Fans, Players, etc. and NOT the respectable native American tribe.
When Yewts and Aggies are talking about Zoobies, Boogars, or whatever kindergarten smack name they are trying to get to stick this week, there is no respect for anything, or worry about confusion.
The term Yewt is to show respect to the Utes... or at least distance the classless abhorrent UofU fans from the Ute Tribes.
Totally different purpose, origin and use than Zoobs, or whatever.