That would be too good to be true.
The real problem for those who want to kill the party is not the elected politicians -- the "RINO's". The real problem is all the people who call themselves Republicans who are not as conservative as others would like.
And guess what? When you destroy the party, those people are still going to be there, holding the same views. They're not just all going to suddenly disappear and be replaced by people who love Donald Trump, or Ted Cruz.
Except the difference is that you will have destroyed the vehicle for building a coalition with those folks, which will leave them with only two options. Either form a new party that reflects their "RINO" views, or join the Democrat Party.
I fail to see how that is a good thing for all the greatly outnumbered conservatives dancing around the pyre. Sure, we'll now have an ideologically pure party -- that only represents maybe 40% of the voting populace. At best.