Petraeus is trying to cover his butt for the soldiers killing the civilians and making trophies of him. So he has a convenient scapegoat in this pastor to cover up his negligence.
How can you believe that troops were killing civilians and making “trophies” of them. All that is happening is charges are made, people are put in solitary then pressure is brought to bear on every soldier to “fess up” One guy cries, WE DID IT, he gets off with light sentencing. The press and the Pressident gets a chit to play later on, and quite possibly innocent men are sent to prison for life. It has happened before, and quite recently too.