One question I have for Christians is how literal do you take the Bible? Then, whose interpretation of the Bible do you go by?
If a Jew takes the Hebrew Bible literally, would they accept Jesus as their Messiah? Not that I believe in the Baha'i interpretation, but it is very similar to what Christians did to the Jews. They took the Jewish Scriptures and interpreted them in a way to make Jesus the Messiah... and Savior... and, for some Christians, they eventually made Jesus God.
I absolutely believe that all of you have put the Christian teachings to the test, and that they work for you. But does applying the Jewish Scriptures, or the Quran, or the Baha'i writings work for them? And I think lots of people in those, or any religion, would say that their Scriptures are true, and they work for them. But they all can't be true... If taken too literal. And I think that is what Christians did to Judaism. They found a way to make the laws not applicable to Christians. Then Islam and the Baha'i Faith give an interpretation that makes some of the Christian doctrines no longer necessary.