You can argue the party ‘rules’ til you’re blue in the face, but if a plurality of voters feel they’ve been disenfranchised by the system, they’re going to revolt against the party in the general election.
Tread carefully, my friend.
The majority of the Party isn’t going to be disenfranchised so that a plurality bent on destroying the Party can prevail.
The establishment figures the revolt that you’re threatening is coming anyway.
If a crack up is coming anyway, then by damn Trump can go to hell.
In fact, this makes for the perfect strategy for the establishment to put Cruz up instead. Trump gets booted, Cruz loses the election because of the revolt, and the establishment gets to say, “told you so.”