I must say I disagree with some of what I am seeing in this thread, to wit:
1. Trump is a conservative and that is why the establishment hates him. I have not seen a lot of evidence that Trump is a conservative. He certainly does not support free market economics, based on the things he has said. He seems more a nativist populist than conservative as far as I can tell. To the degree that the GOPe might be threatened by Trump, it would be his protectionism that scares people like Romney, not his conservatism.
2. Trump cannot beat Hillary. I think if Trump can win the GOP primary, then Trump can beat HRC. The polls already show him beating her head to head, and if you look at his trend lines versus hers, I think you'd have to call Trump the favorite
Like a lot of you, I hope the Republicans come to their senses before this primary is over and nominate someone who I know to be more philosophically in line with my thinking. But I think much of the attacking of Trump is overly vitriolic and knee-jerk.