Jesus was a Jew. He was an obedient Jew. When Jesus confessed to God, "the LORD our God, the LORD is one" just who did he have in mind? A three person God? Or his Father alone?
Read the following Scripture verses and see if you can determine if Jesus' one and only God was a one person being or three person being.
He who conquers, I will make him a pillar in the temple of my God. Never shall he go out of it, and I will write on him the name of my God, and the name of the city of my God, the new Jerusalem which comes down from my God out of heaven, and my own new name." (Rev 3:12).
"My God, My God, why have you forsaken me?" (Matthew 27:46).
But I know that you have not the love of God within you. I have come in the name of my Father, and you do not receive me. If another comes in his own name, him you will receive. How can you believe, who receive glory from one another and do not seek the glory that comes from the only God?
The Head of Christ is God. (1 Corinthians 11:3).
Blessed be the God and Father of our Lord Jesus Christ, the Father of mercies and God of all comfort. (2 Corinthians 1:3).
The God and Father of our Lord Jesus. (2 Corinthians 11:31).
Blessed be the God and Father of our Lord Jesus Christ. (Ephesians 1:3).
The God of our Lord Jesus Christ, the Father of glory" (Ephesians 1:17).
We give thanks to the God and Father of our Lord Jesus Christ" (Colossians 1:3).
Blessed be the God and Father of our Lord Jesus Christ" (1 Peter 1:3).
[Jesus] has made us kings and priests to his God and Father." (Revelation 1:6).
Father.... this is eternal life, that they may know You, the only true God, and Jesus Christ whom You have sent" (John 17:3).
Clearly, the one and only God of Jesus Christ was not a three person being but was his Father alone. Jesus' God was His Father and Jesus' Father was His God. We have not the slightest reason to believe any differently. And since Jesus is not a polytheist he taught us that his God is to be our God.