This is only going to effect the 2nd ballot at a contested convention?
Yes, they're legally bound to vote for
trump on the first ballot, which is why it's still crucial we keep him under 1,237. But they can still mess with him in other ways (by installing Cruz-favorable rules, or preventing actual
trump supporters from speaking).
And, most crucially, after the first ballot they will desert
trump and we will have our party back. We're going to force
trump onto his knees.
This is exactly how Trump will have the nomination snatched from him right under his nose; it won't be the party establishment, but Lyin' Ted that will take it from him
Considering the party establishment is backing Cruz, there's not really much of a distinction.
This is going to do nothing but cause physical fights at the convention. Even if Cruz is able to secure the nomination through scheming, he will be very damaged going into the general.
There won't be physical fights because the
trump-loyalists will be so pathetically outnumbered by real Republicans. All the people
trump brought out of the woodwork to vote for him will go meekly back into the woodwork, and everyone else is going to be so afraid of the Hillary Presidency that they'll vote for Cruz with smiles on their faces.
You can write a saga about a typical
trump supporter, and the last words would be,
He loved Senator Cruz.