This is a pretty loaded topic. If I had to try and simply identify the nature of it all then, yes, the rural portions of these states are thick with conservative devotees. Part of this is rooted in the fierce Appalachian/frontier mindset of "leave me alone," and some of it is the religious side where the south is more evangelical Baptist and Methodist versus the northern ecumenical Catholics and Protestants. The south also evolved with a more diluted impact from European immigration, yielding a more racially charged culture while the older rust belt cities featured more ethnic tensions. This means the rural south tends to move as more of a singular bloc.
And while I can't speak for Texas I assume they have a comparable situation where people will very zealously speak about the divide between the cities and the rest of the State. Here we still hear about the Two Georgias - Atlanta vs all the rest. Many parts of the state speak of Atlanta like a truly foreign land and view it with blends of jealousy, disdain, disgust, etc. Some of it is racial, much of it is class-based, and some of it is simply viewing Atlanta as the far-away government center telling poor folks how they can and can't use their land. The result is, in my own opinion, a divide whereby the rural masses in Georgia are, all other things being equal, more vested in their emotional issues that preserve their cultural values (abortion, gay marriage, immigration, etc) than in addressing the pure economical issues of governance.
But that's just me.
And while I can't speak for Texas I assume they have a comparable situation where people will very zealously speak about the divide between the cities and the rest of the State. Here we still hear about the Two Georgias - Atlanta vs all the rest. Many parts of the state speak of Atlanta like a truly foreign land and view it with blends of jealousy, disdain, disgust, etc. Some of it is racial, much of it is class-based, and some of it is simply viewing Atlanta as the far-away government center telling poor folks how they can and can't use their land. The result is, in my own opinion, a divide whereby the rural masses in Georgia are, all other things being equal, more vested in their emotional issues that preserve their cultural values (abortion, gay marriage, immigration, etc) than in addressing the pure economical issues of governance.
But that's just me.