I seldom post anymore but I have to say that it has been a long time that I have seen someone post with such clarity and eloquence. I agree with every word you have said and you said it beautifully.
That said I think that you have missed a couple of things.
The GOP has hated Ted Cruz for years. They hate Cruz much more than Hillary.
The only thing that they hate more than Cruz is Trump.
The GOP has only rallied around Cruz in an effort to stop Trump.
If there is an open convention the GOP delegates won’t vote for Trump or Cruz. The gravy train that Washington DC lives on would be disrupted by either candidate winning the general election.
If there is a contested convention I will give you 4 to 1 odds that Jeb Bush will be the nominee. I will guarantee that neither Trump of Cruz win the nomination.
Contested convention = Jeb Bush