God is eternal and Mary is not, that’s heretical!
Mary was the mother of Jesus. No doubt. The argument is about who was Jesus?
4“Where were you when I laid the foundations of the earth? Tell Me, if you have understanding. 5 Who determined its measurements? Surely you know! Or who stretched the line upon it? 6 To what were its foundations fastened? Or who laid its cornerstone, 7 When the morning stars sang together, And all the sons of God shouted for joy? 8 “Or who shut in the sea with doors, When it burst forth and issued from the womb; 9 When I made the clouds its garment, And thick darkness its swaddling band; 10 When I fixed My limit for it, And set bars and doors; 11 When I said, ‘This far you may come, but no farther, And here your proud waves must stop!’ 12 “Have you commanded the morning since your days began, And caused the dawn to know its place, 13 That it might take hold of the ends of the earth, And the wicked be shaken out of it? 14 It takes on form like clay under a seal, And stands out like a garment. 15 From the wicked their light is withheld, And the upraised arm is broken.
Mormons also believe God has a mother.