I am not dividing the person of Jesus. He was true man and true God.
In the Nestorian view, the human and divine persons of Christ are separate. Nestorianism argues that Jesus had two persons, the divine Logos and the human Jesus. This is not what I'm arguing.
The rationalization of the council that supported the term Theotokos is correct. Mary is Theotokos because her son Jesus is one person who is both God and man, divine and human. The significance of the term is what is says about Jesus rather than any declaration about Mary.
Rather than the simplistic term Theotokos, I prefer the Athanasian Creed.
[Jesus] is God, begotten from the substance of the Father before all ages; and He is man, born from the substance of His mother in this age: perfect God and perfect man.
Tao;
Good explanation, your presentation is not Nestorian and if you prefer the Athanasian Creed’s formula, rather than Theotokos [which you accept as an appropriate term] to describe Mary’s role, that is not un-orthodox.
I have been here long enough to know that many FR Protestants embrace the Nestorian Heresy 100%. You seem to be one of the few Protestants [assuming you are, maybe your Eastern Orthodox] that actually has this correct.