#1 - The Trinity is Declared in Genesis, beginning in chapter 1
#2 - It is sin to add to God's words what He never said = Proverbs 30:5-6
#3 - It is sin to declare that Mary remained a virgin after the birth of Jesus
#4 - God never had a mother! A body was prepared in the womb of Mary for the WORD to enter into = Gospel & Hebrews
#5 - Worship of Mary, including praying to her is from the deception of idolatry and is faithlessness in the LORD Jesus Christ.
Several of those points are assertions, but they do not address the argument I made.
1. Regarding the Trinity:
I agree that the doctrine of the Trinity is taught in Scripture. My point was that the word
"Trinity" itself does not appear in the Bible. Likewise, the phrase
"Mother of God" need not appear verbatim for the doctrine to be true if it follows necessarily from biblical teaching.
2. Regarding Proverbs 30:5-6:
Calling Mary the Mother of God is not adding words to Scripture any more than calling God
"Trinity" is adding words to Scripture. It is a theological term used to summarize what Scripture teaches about Jesus' identity. The question is whether the concept is biblical.
3. Mary's perpetual virginity:
That is a separate discussion. Even if someone rejects perpetual virginity, it would not affect the question of whether Mary is the mother of Jesus, who is God the Word incarnate.
4. "God never had a mother":
Christians agree that God, in His divine nature, has no mother. The title "Mother of God" does not mean Mary is the origin of God's divinity or existed before God. It means that the Person she conceived and gave birth to is God the Son incarnate. Mothers give birth to persons, not natures. Mary gave birth to the Person Jesus Christ, and that Person is God the Word made flesh (John 1:1, 14).
In fact, Elizabeth said to Mary,
"Why is this granted to me, that the mother of my Lord should come to me?" (Luke 1:43). Elizabeth was the first person in Scripture to acknowledge Mary as
"the mother of my Lord."
5. Worshiping Mary:
I never argued for worshiping Mary. Whether one should pray to Mary is a separate issue. The question under discussion is simply whether calling Mary the Mother of God is true.
So I'll return to the original question:
Do you deny that the Word is God (John 1:1), that the Word became flesh (John 1:14), that Mary gave birth to Jesus, or that Jesus is God the Word incarnate?
Because if all of those are true, then Mary is the mother of the Person who is God incarnate. That is exactly what Christians mean by "Mother of God." It says something about
who Jesus is, not about Mary being the source of God's existence.