Jesus was from the tribe of Juda, who regularly studied what Christendom calls 'the old testiment'. His god, is the god Israel worshipped who is one God not 3. All his life he repeated the Shema, which states, "Hear O' Israel, your God is One.
John 17:3" In prayer to his God, he said, " Now this is eternal life: that they know you, the only true God, and Jesus Christ, whom you have sent".
