Rush explained it quite well today. McCain is part of the “ruling class” along with the dimoKKKRATS. J. D. Hayworth is not part of the “ruling class” so McCain will go harder against a Hayworth than his buddies/friends in the ruling class. Explains things quite well and McCains behavior over the years.
I read that American Spectator article after Rush talked about it today and it is very informative. As you said, it explains why McCain was respectful to Obama and not to people like JD.