This article did not make some things clear. The Nestorian heresy taught that Mary was not the mother of God, because they did not believe that Jesus was God. The Nestorian heresy gave rise to Arianism, which taught that Jesus was just a man and a prophet, which is similar to what the Moslems teach about Jesus. Another way to put this is that the Arians and the Nestorians rejected the Nicene Creed. If you beliefe that correct Biblical interpretation requires the rejection of the Nicene Creed, you are in a rather small group.