I grew up expecting a Soviet 'bolt from the blue' nuclear strike at any given moment. I lived through the Cuban Missile Crisis ready to live for weeks in my school with Civil Defense rations and jugs of water. My parents made every preparation to meet such an emergency, including a basement shelter area.
And those preparations included guns and ammo to confront any enemy coming into our house, foreign OR domestic.
And I'm still ready, so those ragheaded mofos can just bring it the Hell on.