That Austin's heel turn occured in Texas is really secondary to the fact that the turn was totally bungled after the fact, with no real plausible explanation ever given. If you look back on the build to that match, the potential explanation was actually pretty cool: Austin is so totally obsessed with being champion that he'll ally himself with his most hated enemy to maintain a status that he knows he can no longer maintain on his own. Location aside, it was executed very well at WM X7 and then completely mismanaged subsequently.