My cousins have a house on 13th East. My grandpa was a professor at the U. My dad graduated from the U... They're actually really great people. All of them. We've always had a pretty good back and forth about the rivalry.
BUT you wouldn't believe all the things they have heard about BYU that they really believe goes on. They'll hear things like this and totally believe it's a thing. Having attended BYU, it's hilarious BS.