Ann was making a religious statement. Perfection, when Christians speak about Judaism, has to do with the relationship between the two religions, something that shouldn't be too hard to grasp when one considers that Christianity is a Jewish heresy, or, to be less tendentious, builds itself on the foundation of Judaism. We think that Jesus "perfects" (in the sense of "completes") the revelation to the Jews. This older use of the word has less of the sense of thorough excellence and more of the sense of consummation or completion. A cake is "perfected" (or not) in the baking.
If that's insulting, then monotheism is insulting. Certainly I've had Buddhist friends cheerfully mock Christianity as well as discuss their doctrinal objections to it.
Ann was making a religious statementAnn made a religious statement, which is her right as a Christian (just as it is my right as a Jew to reject it). But she also made a secular, political statement: that America would be "better off" if everyone was a Christian. That is demonstrably false, and is a slap in the face to every patriotic Jew who ever did anything for this country, from Haym Solomon on down.