Most research shows that child predators seek out positions of authority and trust in order to best take advantage of youth. It not only forms a relationship of trust, but one of fear if they speak out. Id imagine it's way easier to become a pastor/preacher/preist than it is a teacher, or school liaison officer, or community leader.

Not saying there aren't problems with the church/religion as a whole. Christianity especially, most Christians now days represent almost everything Jesus spoke against.