abelard
Player Valuation: £35m
That is precisely why he offends them.
Rove, the Kochs, various people on Fox (Krauthammer especially), Glenn Beck and loads of other balloons spent years and years promoting the idea that any successful GOP candidate had to be tough on immigration, overwhelmingly pro-business, anti-Muslim, American exceptionalist, anti-Washington and isn't afraid to say what he* thinks.
* that is to say, what they tell him to think.
but Trump is all of these things too
he just uses a megaphone where a dog-whistle used to suffice. Ronald Reagan, for example, kicked off his 1980 campaign in Philadelphia, Mississippi (https://en.wikipedia.org/wiki/Mississippi_civil_rights_workers'_murders) talking about "States' rights"
That's not exactly subtle.
It's a bit rich for GOP leaders to protest about Trump's racism when this has been a staple of Republican rhetoric since Nixon. Trump is just slightly more brash, although when you look at what Ted Cruz says, it's debatable who is even more belligerent. I suspect this is why most will quite easily make their peace with him.
He is like McGovern or Carter in the 1970s, who Democrat elites reviled in the same way, for much the same reason - it had much less that do with what they said (and what Trump says), and more because they usurped control of the party without greasing the correct wheels and deferring to approved channels.