...he'd have called you a "Texan", or better (actually worse), a "Tejano". There are Texans, and there are People from Texas. Texans/Tejanos are the arrogant, insufferable boors that readily and happily assume the stereotype as their raison d'\ufffdtre. You find Tejanos all over the world (even in the White House, but I digress...). People from Texas, on the other hand,just happen to have the current misfortune of living in The World's Largest Hole In The Ground. People from Texas generally agree that Texas is "a nice place to be from...".
So take a deep breath, and admire the subtleties.