When the OT prophets wrote that God wasn't a man, it was before the incarnation.
Where does the New Testament say Jesus is a man-God?
Furthermore, when the incarnation occurred in time on earth, God didn't change or transform into something or someone else. God's eternal Spirit and nature remained the same. What happened at the incarnation is that God added to Himself a genuine human existence while simultaneously continuing to exist as he always had.
Jesus was a man with a human mother who was fallible like anyone. If Jesus was God then he couldn't have been tempted with evil, couldn't have died, wouldn't have needed to ask God to save him from death, wouldn't have a different will than God, and wouldn't be unaware of things God is aware of.
The man that God became was a genuine man, an authentic human and from his perception and perspective as a man, the man had a relationship with God, who continued to exist as the eternal, immutable, omnipotent and omnipresent Spirit that He always has been.
Anything Jesus did we can do. Jesus received the Holy Spirit at his water baptism and other people receive the Holy Spirit at their water baptism. Jesus performed miracles and others performed miracles, Jesus walked on water and Peter walked on water, Jesus forgave sins and said his disciples could forgive sins, Jesus was resurrected and we can be resurrected, Christ reigns and we can reign with Christ, Christ is an heir and we can be co-heirs, Christ had glory and we can have glory, Christ needed saving from death and we need saving from death and the list goes on.
Are you starting to see who Jesus is yet? Jesus is the full potential of what a regular human who obeys God is capable of. That doesn't make someone God.
That Christ is God is something that both the OT and NT affirm often and strongly. You are like the CNN reporter standing in front of a burning building and calling it a mostly peaceful protest. You are being highly selective and biased as to what you allow the scriptures to say. The text is clear.
1 JOHN 5:20
We know that the Son of God has come and
has given us understanding so that we know the real God.
We are in the one who is real, his Son Jesus Christ.
This Jesus Christ is the real God and eternal life.
1 John 5:20 just echoes the same thing Jesus said in John 17:3. I finally figured out you're using the God's Word Translation and I would recommend not doing that. No other translations agree with it either.
Eternal life = Knowing the true God who is the Father
John 17
3Now this is eternal life, that they may know You, the only true God, and Jesus Christ, whom You have sent.
Eternal life = Knowing the true God who is the Father
1 John 5
20And we know that the Son of God has come and has given us understanding, so that we may know Him who is true; and we are in Him who is true—in His Son Jesus Christ. He is the true God and eternal life.