Catholic faithful, especially men, need to be vigilant during Mass. I had to warily get between a homeless man and the priest during the homily at a traditional Latin Mass. Brought along my missal to defend against a knife attack, waited to engage until more men came to assist. Another called the authorities as we maneuvered the man out of the building and had two watch during the rest of the Mass. Wouldn't hurt to have some faithful with conceal carry permits around either.