3. There have been many thousands of abusers over many hundreds of years.
The dirty dozen mentioned in this article are just the top prelates involved in covering up thousands of sexual abuse cases.
The catholic church is an institution that incorporates systematic cover up/secrecy policies for pedophilia practices replete within its hierarchy of priests and other members. This practice began many hundreds of years ago as young boys from surrounding villages marched into monasteries and abbeys with hopes of becoming educated priests whilst established monks/priests/prelates watched from balconies and picked out the child/children they would claim for their night visits.