I had someone tell me that from a Christian perspective, Coulter had it right: that Jewish people are "imperfect" until they accept Christ.
I think the issue is not "is Ann Coulter, from a Christian perspective, correct". From a Mormon perspective, Mormons are Christians 2.0 (just like Christians consider themselves Judaism 2.0). From the Muslim perspective, they are the better followers of Christ than the Christians (first part of the Koran has some attacks against Christians for not following the things Jesus had taught).
The issue is with her statement of "Well, I want to see all Jews converted *to become perfected*." Just because something makes sense form your religious viewpoint doesn't mean you get to dictate to the rest of the world what to believe, and how to act. If the Coulters and their ilk had their way, then there would be no separation of church and state.
That, I think, is what prompted the hosts abject horror. Look at her other statements: that it would be best to kill Muslim leaders and force Christianity on them. Why? Well, because according to her religious views, that's the right thing to do, after all! How else will you save their souls if they won't agree - just force them, then.
That is the true terror of her statement and those who agree with it: it removes personal choice of religion, and replaces it with forced State religion of whatever religion gets the most votes to ram their beliefs down everyone else's throats. See also: Taliban and Afghanistan, China and Tibet. It's the exact opposite of what the Founders had hoped for.
So I don't care if she's "right" from a religious perspective - her views are dangerous, and I have no problem boycotting any show that decides they need to invite her on to peddle her ideas of hate and intolerance.