You know, you could also add Zoroastrianism in there, since the religion was based off of Judaism in the 8th century B.C. Zarathustra went back to his own land in Iran, and the Medes/Persians learned of Zarathustra's "message" and embraced it. Since this is for M2TW, you could do it, since five cultures or religions can be integrated. Polytheism can be paganism, Zoroastrianism can be Islam, Yahawism can be Orthodox Christianity, and Ashurianism can be Catholicism. And of course, heresy can be heresy.