"...the religious climate of the city of Ephesus with its temple of Artemis and the worship of this “Great Mother,” originally “the virgin goddess,” became conducive to replacing the pagan Artemis with the Christian Mary. It would be a way to merge paganism into Christianity and would facilitate the conversion of pagans into the new faith and religion..."
Jesus is God.
Therefore, Mary is the Mother of God.
It is really quite simple logic which has been understood for millenia.
This is an ecumenical thread. Take antagonism to an open thread.