A formerly Baptist woman wrote on the Coming Home Network forum:
If I called Mary God’s mother, I felt I was saying the human being born at a certain time in history (a creature) had “created,” had given life to, God Himself, Who had not previously existed. That was hard for me.
If they deny that she is the mother of God (the Son), then they deny that Jesus is God, which they don’t want to do.
If, on the other hand, they deny that she is the mother of God (the Son), then they deny the Virgin Birth, and in effect, also the Incarnation, which they don’t want to do, either.
This resolves the problem altogether. But she is not only the mother of Jesus’ human nature, because motherhood is about giving birth to persons, not natures (or souls, as in our case, when mothers give birth).