It's the law. You can't just bend it at a whim. You may disagree, but the people of Utah clearly don't, as they voted on it in 2004. For clarity, the law is that people with concealed carry permits are allowed to carry a concealed weapon on campus.
Say what you will about your opinion of gun laws, but it's still in state's rights to do what they will with them, especially on the concealed carry level.
Cop's refused because it would be illegal for them to do so. I don't see how we can point the blame at them. The blame, as usual, should be pointed squarely at those nutjobs sending the death threats.