Doctoral thesis on the horizon: To deny the title Theotokos or "Mother of God" sooner or later requires a misunderstanding of both ancient and modern understandings of what a mother contributes to her child.
In the carol "Once in Royal David's City" we sing:
Mary was that mother mild,This may be why the custom of carol-singing fell out of favor ....["was NOT!," say the Protestants]Jesus Christ, her little child.["was NOT!," say the Protestants]
Mary "contributed" a fallible, human nature to Christ who was completely man and completely God.
But once again we see Roman Catholics choosing the opinions of various "church fathers," all fallen men, over the clear and simple understanding found in Scripture.
When Jesus was asked where His mother and brothers were, He pointed to believers as His family.
Rome points away.