It really does though. You can't win everyone. The Republican party has become the party of poor, working class, no college degree whites. We have to just accept that. Democrats have courted minorities and college educated whites. This has caused a backlash among whites without a college education. If we started courting whites without a college education we'd have to severely change our party value system (e.g., drop support for gay marriage, support the confederate flag, etc. etc.)... most liberals don't want to do any of that.
Or maybe you just want it that way. The latter part of your post is basically admitting it is not set in stone.
Yes I do. However, it does have to be that way because the vast majority of the party also wants it that way, so it will end up being that way. Do you think most Democrats will want the party to shift on gay marriage just to court rural voters in Wisconsin? It's not going to happen.
Public opinion on gay marriage is changing rapidly, so I do not see how that is an impediment. The confederate flag is not as popular as it used to be either.
It seems to me you assume rural whites to be these stagnant beings, incapable of being persuaded, but rather must be dragged along for the ride.