And, maybe Cruz isn't really angry. Maybe he's just faking.
As Trump looks at all this, he must/should be thinking, "For what reason will guys like Bush, Rubio, Kasich and Cruz want me to win in November? Is it possible that they will want me to lose?" Bush and Rubio still have some clout in Florida. Kasich is governor of Ohio. Those are important states. I think these guys could be helpful to Trump. The other side of that coin is that they could also be harmful to Trump. He should try to figure out a way to get them invested in his campaign, if that is still possible.
You write with wisdom. But I do believe that Trump wins Texas without Cruz’s support. And, in fact, Trump has stated he doesn’t care if Cruz supports him or not.... He might even have said he didn’t want Cruz’s support. Perhaps because Beck would go with it.