I agree. Historical evidence suggests that the conception of Satan isn't even original tradition, but Zoroastrian influence coming from the Jewish community in exile during the Babylonian period. This makes sense because Zoroastrianism is a true duality, of good and evil. But Christianity is not. Evil can only happen through the omission of action by God. God has ultimate, final say. Therefore anything that occurs, occurs with God's tacit consent. Including evil.