Republicans fear their base, (and primary challenges from the right) a lot more than they fear losing to Democrats (scoff) in general elections. They also feel (rightly) that they were elected to fuck shit up. Fucking shit up is not a bug, it is a feature of GOP governance.
So yes… this monstrosity should kill them but it will only make them stronger.
You can read a longer version of this lament here if you are into that sort of thing.