Aside from the fact that you're ignoring all the long-term damage they can do, you're also making the mistake of thinking that this will make it less likely for other Republicans to get elected in the long run. Voters are stupid and have short memories, and the power will shift back and forth between the two parties for as long as they both exist. When Republicans get elected (and they will, they always will) we want them to be sane ones that won't destroy the country. Democrats might get a nice election victory running against these fucks at some point, but we were eventually going to get one anyway.