Who is God from A History of the World in 10 1/2 Chapters and what is their importance?

God is referred to throughout "The History of the World in 10½ Chapters," by Julian Barnes and appears to be the Christian God, although other faiths and cultures are mentioned in the text. In the Christian view, God is the Father of all, the Creator of the Universe, and the Supreme Deity. God is also the father of Jesus Christ, Lord and Savior to His followers.