Christians must not say that their religion is right. Only Muslims can do that:
"The American Jewish Committee on Friday announced that the organization is outraged by Ann Coulter's assertion, made while she was on the Donny Deutsch CNBC show "The Big Idea," that Jews require "perfecting" by becoming Christians. Coulter expressed the idea that Judaism should be discarded, that Jews required Christianity to be "perfected", and that Christianity holds out the unique promise of a "fast track" to God.
"Ms. Coulter's assertion that Jews are somehow religiously imperfect smacks of the most odious anti-Jewish sentiment. One would think she would know better than to utter such intolerant words," said AJC President Richard J. Sideman.
Source
Once upon a time every Christian denomination believed that it alone had the whole truth. Many still do. Jehovah's Witnesses refer to their religion as "The Truth". But it is apparently now incorrect for a Christian (which Ann is) to say so.
The numerous Jewish "Haredim" are pretty emphatic that they are right too. The AJC members should grow up. They are just another Leftist outfit anyway.