We can look at it from different angles: the external situations, the people who are involved, Jesus' own stand. Death is something everyone has to face it whether we want or not. We need to blame someone or something.
If Jesus accepted his death as the will of God for him, that was his role in the big drama of this world, then there is no point of blaming anyone. He has done his role perfectly well. Just as every drama or every film has a message to convey, so the question is: what did we learn from this drama of Jesus for our life? Whom do we want to imitate? The Sadducee, the Pharisees, the priests, Pilate, the Fisher men, the tax collectors, the prostitutes, the common people? Everyone acted well their roles: it is for us now to decide. It is not useful to ask the question, who is responsible for Jesus' death? The question might be: what did I learn from the death of Jesus?