Genesis teaches that God made humans in His own image and likeness. Catholic theology says that means with intellect and free will. If God interferes with our free (but often uninformed) will, then He is acting against His own free gift to us. So by refusing to stop these horrible crimes, He is paying our human dignity the ultimate compliment. Now the apparitions of Christ and Mary tell us that even in their glorified state, the sins we humans commit grieve their human natures. So Jesus is suffering in some sense right along with those kids, parents and the rest of us who see these crimes. He is on our side at all times, and even grieves for the perpetrators of crimes.