I agree with you in part. There certainly is a fringe group of the NeverTrump movement that will not abandon their messiah, even if he shows himself to be a backstabbing, Hillary supporting traitor. But I think there are some, maybe half or more, for whom such behavior by Cruz will be the last straw for them. I think Trump understands this, which is why he agreed to let Cruz speak. Trump has weighed the risks and understands he has little to lose from letting Cruz speak.
Give him enough rope to hang himself.
Your optimism of the #NeverTrump folks is better than mine. I literally have to check their posts on Twitter in order to determine if it’s a liberal or a #NeverTrump “conservative”. They are firmly #NeverTrump from what I see and would relish in Ted’s non-endorsement. They will call it “principled” and lament over the fact the country rejected such a fine leader. I had one tell me that he would rather have 4 years of Hillary and 2 Hillary Supreme Court picks to get Cruz in 4 years than have Trump.
I hope that you are right and many realize that the stakes are high and come around. I saw that Michael Reagan endorsed Trump tonight, and he has been opposed to him.
The other speakers have set the bar so high that he will come across as a dud. He may get good if he goes too far.
Pray America wakes