There is some benefit in not letting perfect be the enemy of good. There is also overtones window shift. Accepting his leadership as normal will tend to normalose it.

If the bar is only as high as let’s not be completely useless and dysfunctional, they are better off politically ,and the country is better off, by letting the crazy side show their craziness as a negative. They will shown the people, and by extension, more moderate Republicans.

The reason the crazies took over is that they offered political advantage by courting the racist, bigoted vote. Moderates held their nose and went with it. They feared losing power on an individual basis as well as collectively. All politics is loacal. So if the crazies mean your voters stay home or are more likely to flip, you are more likely to disagree with them and push the out. If they are winning you elections, that’s not going to happen.