Forgive my ignorance, but why do American churches need armed security? Are they targeted for robberies or attacks? Here in England nobody has guns and the only people who go to church are little old ladies on meagre pensions. There certainly won’t be any banknotes in the collection tray.
Sadly churches and schools are targeted because they are perceived as defenseless. Mass shootings are rarely, if ever, about robbing. Most of the perps are just trying to get their names in the media to become infamous. Workplace shootings are usually disgruntled ex-employees seeking revenge for losing their jobs or being mis-treated. In nearly all cases, they happen in places where guns are prohibited.