On the one hand, I don't really want to criticize other people's religion. On the other hand, by all general criteria, your wife is at least as much a Christian

On the one hand, I don't really want to criticize other people's religion. On the other hand, by all general criteria, your wife is at least as much a Christian as a Mormon or a Jehovah's Witness is, and very few non-adherent Jews would describe her as an observant Jew. https://en.wikipedia.org/wiki/Messianic_Judaism https://en.wikipedia.org/wiki/Messianic_Judaism for people who are interested in a summary.