A Mexican priest turned on his own church congregation with a watergun loaded with holy water.During mass at his church in Acatlan, Father Juan Ramon Hernandez said he decided to act after becoming saddened by drug-related killings and violence."Let's pray to change the heart of the people who use violence and kill other people," he said. "Let's throw all the guns far away."Some children, who were making their first communion, giggled as the priest sprayed churchgoers with holy water.