I catch over a handful of non-BYU Zags games every year & cheer for them bigtime in all their ooc games. Particularly when they go against national powers. It's not primarily about cheering for BYU interests. I (like a lot of people) have been a Zags (& Few) fan for a long time (for me it goes back to their '98/'99 tourney match against UConn).
Obviously clocker is a BYU & quite probably a WCC fan, even though the Zags are his #1. Probably a college hoops fan more generally, too.
This really isn't a hard concept to swallow. He's a brother.