“I don’t think your approach of continuing to keep the existing parasite within our body is preferable to isolating and excising it.”
I understand, but you must consider the practical consequences of trying to physically excise the parasites when half a state is filled with them. We are a nation of 300 million people. Forcibly relocating half (or even a quarter) of them would result in one of the largest social upheavals in world history. Are you ready to do that? We are in big trouble, either way.
If there's a voluntary geographic division of the country there wouldn't be a need for forcibly removing anybody. Conservatives will voluntarilly pack up and move out of the liberal area if they find themselves on the wrong side of the line, and people that value their Social Security check more than freedom will voluntarilly relocate to the liberal side.
It wouldn't matter to me where they drew the boundaries. I'd be moving to the land of freedom. If it was decided to put Texas into the liberal area, would you stick with it because you like the geography, or would you pack up and move elsewhere to regroup where the Conservatives are?