Tossing out the liberal wing of GOP now would severely damage the country. On the other hand, do you think the liberal wing of the GOP will ever allow themselves to be removed without severely damaging the country? The cancer has already metastasized badly, and cutting it out now will likely kill the patients. But allowing it to grow further will make recovery even less likely.
I agree with your observation but before we abandon the present system this close to the election we need to have already mobilized elsewhere. We need a strong conservative movement within the Republican Party if possible, outside it if not.
I look for Rush to lead an effort after the election even though he hasn’t said so. For now it is one more vote against instead of for someone.