You're relaxing on the sofa watching your favorite program on TV, when a knock at the door disrupts the quiet. Wondering who could be coming by at this hour, you go to the door and open it. It must be a neighbor in need of something, or perhaps a stranded motorist. You open the door without mistrust. This isn't a violent area.
Folks know each other.
You and your family have lived here for generations. Suddenly you find yourself being attacked for no reason. It's completely outside your frame of reference. This can't be happening to you. This can't be happening here.