The Sins of the Father takes place at Judgment day. All of the souls of all of humanity are gathered before the angel who holds the book of judgment. The first to be judged stands and all of humanity cries out - "when we were hungry, you gave us nothing..." And then we discover that the accused is God.
Pete takes the direction of our wrestling with God. For me, it raises questions regarding the absence of God and the presence of evil. But, I like where he goes. He picks up the tradition in the Bible of wrestling with and even accusing God and sees that as a foundational part of our faith tradition. That works for me.