My grandparents are Mennonite, and therefore pacifist by religion.
I think part of the lure of living in Amish country for them (other than the fact that grandma was raised Amish) is that, for all intents and purposes, that sort of shit (guns, invasion) does not go on there so they get to not think about it. Although, frankly, it makes me think of In Cold Blood so whatever.
I can imagine my grandparents trying to talk their way out of a dangerous situation, sure. Talking about The Lord and stuff, like that lady who was kidnapped in Georgia. I can see them giving every earthly posession to their attacker in exchange for life. I can see them up and leaving their homes behind if their hometown was invaded.
If they did end up needing to fight back at someone for whatever reason, I’m sure it could be justified in their minds by being the will of God that they were not actively seeking to hurt someone, they were defending themselves. They would probably not come to this conclusion until way after the American Justice System would come to it.