They didn't have to replace anything, they chose to and it's a completely different situation. No one assumes negative stereotypes about Texas because of Leatherface.
Antagonizing rednecks have usually been consider as acceptable since the beginning, which is the lifestyle Leatherface and his family kinda have. I think Tribal theme on the other hand needs to be done more carefully. I certainly don’t want the outsiders to be the victims like in some horror movies.