Simple, yoda.
Jesus Christ is not God. He is not the God Himself.
According to Him: there is ONLY one true God... and that is His Father in heaven. Nowhere in the Scriptures does it say that Jesus Christ is God. He never claimed to be God.
Yes. Jesus is a 'son of man'... because that's what He truly is.
Yes. Jesus is a 'son of God'... because that's what God says in the Scriptures. All prophesies in the Old about the 'son of God' - the 'messiah' - were fulfilled to Jesus Christ. These happened by virtue of God's will and God's plan.
Yes. Jesus has no power by Himself alone. He never claimed it was His own. He has the authority and power over all things because God gave those to Him. If Jesus is God, He doesn't need somebody to give Him power or authority... because God is synonymous to "omnipotent"... Jesus is not.
Yes. They are ONE... not of being God... but [as what you emphasized], as what we can read in John 10:28-29, Jesus Christ and the Father are of ONE accord - ONE purpose. The context is not about Jesus' being God or not. Jesus was talking about the CARING OF THE FLOCK. Meaning, they have one purpose of taking care of the flock.
Yes. God will never create another God. He will not even let Himself transform into a human being[or to become a man]... because He already declared the distinction between God and man: God cannot be a man and no man can be God.
Again, I believe to what Jesus Christ was saying that: the Father is the ONLY true God. John 17:1-3