The difference between Coulter and O'Rourke is, O'Rourke doesn't have to be hysterical to make a point, regardless of whether you agree with his point or not.
The fact O'Rourke hasn't been condemed is because he hasn't said anything about the Jersey Girls.
Even if he did, he would do so with a sentence so wittily constructed that even the Jersey Girls supporters would laugh, because he would make sense, and it wouldn't be in a hysterical sort of way.
I've read quite a few of O'Rourke's books, and though I'd have to give him the nod on literary quality, Coulter is a very funny writer. Almost as hysterical as O'Rourke. She zings with the best of them. And I'm not a member of the Coulter claque. She goes over the line too much, and she is wrong at times. But she is very funny. And her arguments are usually very sound.