If your claim is that by saying that Mary is mother of Jesus equals Mary being mother of God, then y’all are making NO distinction between the incarnation of diety and Diety Himself.
Therefore by your claims and failure to make the distinction, God is both human and Deity, and when Jesus died on the cross, then Deity died.
That is precisely the mystery of the incarnation. God himself became man. To say otherwise is to diminish into non-consequence the crucifixion, and to assume then that Jesus was a creation of God. Which is Arianism. It is not something to be distinct, except with respect to which person in the Trinity became Man.
The insistence that the incarnation literally means God became Man (Jn 1:14) is part of a basic Christian teaching. It's exactly what the title "Mother of God" defends. Because, Jesus the person was never at any time not God.
Oh and by the way, the word "trinity" itself does not appear in scripture either. But we use it because the word best fits the description of one God and three persons.
So if you want to be super restrictive to anything not directly word for word mentioned in scripture, than you'd have to do away with Trinity too. The same reason we can use Mother of God is the Same reason we can use the word Trinity. Because the description fits the word. To hold the scriptural interpretation to only a word for word application like you do makes the scriptures unintelligible and inapplicable. Since we should not therefore use any English words to translate it.
If your claim is that by saying that Mary is mother of Jesus equals Mary being mother of God, then y’all are making NO distinction between the incarnation of diety and Diety Himself.
What is the distinction between the incarnation of deity and Deity Himself? Is the Word made flesh any less God than the Word that was in the beginning?
If only Christ, the man died on the cross, it would mean that God had wasted a lot of time sending His son here, Either Christ, son of God, God, died on the cross or it was a worthless gesture.....think about it and get back to Church!