I don't follow college football closely, but if you're the star QB of A&M it doesn't look smart rolling up to a UT party;especially in some bright pink shirt. I always thought the rivalry down there was like Michigan/Ohio State, Florida/FSU etc.
I wouldnt put it up there near the most hated rivalries (Michigan/OSU, Bama/Auburn, etc.) but yeah they dont like each other so it shows the lack of common sense Manziel has. Noone in hell with a lick of sense would have thought he would be welcomed to a frat party at gotdamn Texas.