So did the ancient Sanskrit (Hinduism, Buddhism) Greek (Hellenism) and Nahuatl (Azctec) written cultures. Their cosmologies and moral systems are totally at odds with one another, let alone Christianity or Judaism. The pitch for all of them is essentially still, "just true me bro." The more recent variants of Christianity alone are often cosmologically and morally incompatible, sometimes violently. We don't have a full picture of historical "original" Christianity as the Apostles are claimed to have practiced. And then there's Islam, which being newer has arguably more historical documentation than any of the aforementioned faiths. So, which to choose?