it's always easier for some pencil pusher sitting in the office with all the time in the world to think about "was the force applied justifiable & necessary?" when you only have milliseconds to make a decision and respond.

if someone treatens me or my family with ANY weapon i will let them have it and think about the consequences later.
they won't get hurt if they don't come into my house, it was their choice & they gotta live with it

WHEN IN DOUBT, DROP THEM FIRST & ASK QUESTIONS LATER