I responded to some Catholics on Facebook. The context was whether Mary is the "Mother of God".
There's a lot of equivocation going on in this comment thread. Is Jesus God?
i) It's unorthodox to say that Jesus is God without qualification, just as it's unorthodox to say the Father is God without qualification. After all, without introducing necessary qualifications, to say the Father is God and Jesus is God entails that Jesus is the Father. Surely we wish to avoid that conclusion.
Orthodox theology requires precision thought. Using simplistic terminology isn't orthodox. So let's drop the facile accusations of heresy when the accusers are using ambiguous terminology.
It would be more precise to say the Trinity is God. Likewise, it would be more precise to say each person of the Trinity is divine.
ii) In addition, Jesus isn't simply divine. Rather, there's the doctrine of the two natures. Distinguishing the two natures isn't equivalent to separating the two natures. Some things are true of Christ's human nature that are false of his divine nature, and vice versa. That's a necessary, orthodox distinction.
There was never a time when the Son qua Son did not exist. Mary was never the mother of the Son qua Son.
I repeat: orthodoxy requires precision thought and precision formulations.
Now, you can say things like "God died on the cross" in the extended sense that an individual died on the cross who united divine and human natures in one person. But to say "God died on the cross" without further qualification is confusing, inaccurate, and unorthodox.
"Motherhood" has connotations of sourcehood. Mary was not the source of the Son qua Son's existence. Jesus has an origin in time. The Incarnation as a calendar date. But orthodoxy requires us to draw conceptual distinctions.
Consider the following logic: Jesus is God, the Father is God, therefore Mary is the Mother of God the Father.
That's a problem with using simplistic, ambiguous formulations. In their zeal to paint evangelicals in a corner, some Catholic apologists are painting themselves in a corner. Don't use arguments that can easily be turned against you.