Well... Texas didn't have the same history with slavery that the rest of the eastern states did... I mean it was pretty much wilderness territory up to the Civil War. The whole "Texas session" sentiment isn't one of "we are a Conservative bastion and we want keep it that way" it is rooted in the fact that The Republic of Texas was a nation unto itself before statehood. One that its citizens fought for with Mexico for many years before the US even stepped in. Sure, it is a stupid ideology, but the state comes by it honestly.