Why did these priests continue their sexual abuse on mostly young boys? Was and does it remain a sign of the ?

cheese has it right, and also cited who should be researched to give you more detail into this answer. The questions to ask are, 1. Why is the Vatican built on top of the ancient ruins of a temple dedicated to the worship of the pagan god Mithra? 2. What does the Vatican have an obelisk on their grounds which is to the same worship? The article I cite states, "a genuine Egyptian obelisk shipped from Heliopolis to Rome by the Roman emperor Caligula. The obelisk is of course a phallic symbol but it also was used in sun worship. It is claimed that the word obelisk literally means Baal’s shaft or Baal’s organ of reproduction. Source: Masonic and Occult Symbols Illustrated, by Dr. Cathy Burns, pg. 341" So, it is true, what they do to young boys has something to do with the spiritual energy they posses.