"The research team's conclusions in this highly readable 379-page document confirm the view of the psychologist Philip Zimbardo that if you find many bad apples in a barrel, there has to be something wrong with the barrel. The pattern of abuse and cover up was the same all over the world." 

The rotten barrel is the all-male clerical system that finds the status quo, preserving its own power, and protecting is own members is more important than the Gospel.