Blue Laws & Risk
Massachusetts retains blue laws from the Plymouth Bay Colony that requires able bodies men to arrive at church WITH their long guns. All men were considered militia soldiers and needed to be armed.
I've been in church (2004) when a non-member interrupted services and approached the minister directly on the altar, coming within 3 feet. It was an "Oh sh*t" moment for me 25 pews back. No harm was done. The minister diffused the situation with intellect. Afterwards, the minister asked "Guys, could I get a little help next time? I spoke to this guy's wife afterwards and he's suffering from mental illness. She apologized for the family."
Since that day, I don't feel anything but "obligated" to carry in church.