I was away for a day or two so I have neglected answers to my posts and some questions asked of me. My apologies, I shall, God willing, attempt to answer over the next few days.
For the time being I want to be specific about what John MacArthur said in the link from the first post. Here is one paragraph which contains the explicit Christological error that was cited by myself and others -
John MacArthur said
Now if that is not worship, I don’t know what worship is. There is no other definition for that; none whatsoever. Rob Zins writes, “The snowball of Mary in superiority will roll down the slope of Catholic fantasy until she becomes, in their minds, immaculately conceived, sinless, assumed into heaven, and finally redemptress and co-redeemer with Jesus Christ.” And that is exactly right. In fact, Roman Catholics refer to her as Theotokos, God-bearer. They say she gave birth to God and thus is to be elevated and adored. She gave birth to God. That is a terrible misconception. She gave birth to Jesus in his humanity. She did not give birth to God. God was never born.
I wonder how John MacArthur responds to a critique that points to this portion of the Nicene Creed
And in one Lord Jesus Christ,
the Only Begotten Son of God,
begotten of his Father before all worlds,
God of God, Light of Light,
very God of very God,
begotten, not made,
being of one substance with the Father;
by whom all things were made;
who for us men and for our salvation
came down from heaven,
and was incarnate by the Holy Ghost of the Virgin Mary,
and was made man;
asking how his stated view, shown above, can be reconciled with it?
And, for those who accept the Formula of Chalcedon which says:
We, then, following the holy Fathers, all with one consent, teach people to confess one and the same Son, our Lord Jesus Christ, the same perfect in Godhead and also perfect in manhood; truly God and truly man, of a reasonable [rational] soul and body; consubstantial [co-essential] with the Father according to the Godhead, and consubstantial with us according to the Manhood; in all things like unto us, without sin; begotten before all ages of the Father according to the Godhead, and in these latter days, for us and for our salvation, born of the Virgin Mary, the Mother of God, according to the Manhood; one and the same Christ, Son, Lord, only begotten, to be acknowledged in two natures, inconfusedly, unchangeably, indivisibly, inseparably; (ἐν δύο φύσεσιν ἀσυγχύτως, ἀτρέπτως, ἀδιαιρέτως, ἀχωρίστως – in duabus naturis inconfuse, immutabiliter, indivise, inseparabiliter) the distinction of natures being by no means taken away by the union, but rather the property of each nature being preserved, and concurring in one Person (prosopon) and one Subsistence (hypostasis), not parted or divided into two persons, but one and the same Son, and only begotten God (μονογενῆ Θεόν), the Word, the Lord Jesus Christ; as the prophets from the beginning [have declared] concerning Him, and the Lord Jesus Christ Himself has taught us, and the Creed of the holy Fathers has handed down to us.