Full offense but as you mentioned we’ve already seen what the “southern” ideology does when left to itself and fought a rather bloody war about it. Unfortunately the American military has this historical pattern where they win the initial military campaign and lose the occupation. Imo the south is the ultimate example of this, we simply let the former slavers be and gave them seats in Congress. What we should have done is called a new constitutional convention with representation from freedmen instead of trying to ship them off to Liberia or whatever.
So after the war the social relations in the south changed somewhat in form but not in essence we’re still dealing with the fallout today. In short, I think conservative Texans don’t really deserve to be satisfied with the state of the national government.