Therefore because the divine nature and human nature were inseparable she became the Mother of God.
By saying that Mary was not the Mother of God you are denying that Jesus’s human nature and divine nature were inseparable after the incarnation.
Doing so would be shear Nestorianism.
According to Fr. John Zuhlsdorf, a well-respected Catholic liturgicst and Latin scholar, Nostra Aetete is mistranslated to say that Catholics and Muslims worship the same God.
http://wdtprs.com/blog/2010/09/questions-raised-by-nostra-aetate-about-the-christian-god-and-muslim-allah/
No, Nestorius taught that there was no union between the divine and human nature. I believe there was a union between the two. Jesus got His human nature from Mary in order to fulfill prophesy and take on the sins of man but He was also truly God. Don’t throw around names unless you know what you are talking about or don’t make accusations assuming you know what I believe.
God can have no mother or He would have had a beginning. Are you denying the existence of Jesus, the Word from all eternity?