I can only speak to my experiences.Its not close to the water bottle incident with the Duck cheerleaders. As I mentioned, I talked to a UCLA band member that backed me up. ASU is not know as a particularity hostile environment for visiting teams or fans, irrespective of your experience. You can get mugged in the area around the LA Colosseum. Its is usually small college towns like Tucson where the attitude is more extreme. The Phoenix meto area does not live and die on college athletics and many are transplants. Pro teams are #1 and all the things to do with the good weather in the fall. I would guess CU is laid back and too liberal to care about athletics to some degree. Sorry about your experience but in the big picture I question it as the general fan experience?
The fans that I've run into at PAC-12 BBall tourneys in Vegas also tend to exhibit the same douchiness. AZ are worse there, but at least they've won something, ever.