I wouldn't direct that at Texans. Not every Texan is a Longhorn fan. There are just as many A & M fans as Longhorn fans it seems. Here in North TX, for reasons I don't understand, there are cars with OU stickers and TX plates.
With the NFL, I root for the home team. I'm not from the Dallas area but live there now, the Oilers aren't around anymore, it doesn't feel right to root for the Titans, and the Texans came around after I left the Houston area, so I'm a Cowboys fan. College football, that's an enigma to me. There's fans of a school that have no affiliation with it whatsoever. There's Texas fans that didn't go to UT, nor any of their family members, yet they're fans.