A lot of people live all alone and don't worry about owning a gun. There are home safety systems; some of them are deterrents.
I live in a town that isn't riddled with violence. But a young father here was fearful so he purchased a gun. He kept it loaded and put it in his coat pocket when he took his children out to play. The gun fell on the ground, went off and killed his young daughter!
If anyone knows anything about gun safety then you know never to have a cocked gun in your pocket in the first place. Added to that the safety had to have been off on the gun for it to go off when dropped. This is why we all say get training !! In some states now the training is mandatory in order to get the permit in the first place.. It's a real shame this happened in your town and to that family and especially to the girl but that guy was careless or just plain uninformed, certainly ineffectively trained up in the use of firearms. And added to that the gun should have been in a concealed holster to begin with.
For the most part the home systems work well. But you get a drug crazed nut breaking in, that isn't about to make him flinch. The thing about home safety is you feel secure until you find out you really weren't, now your faced with a 260lb hairy nut in your house and he's coming for your throat or wants into your body ( yes I mean rape) that little buzzer going off isn't helping you any. And these day's will the police ever even show up ? That's getting questionable. He could kill you meanwhile or just have fun where you don't want him to be.
God doesn't give us the right to attack another person or even seek revenge but he does give us the right to protect ourselves in the night at home for sure and in other cases as well.
What does the Bible say?
1. Exodus 22:2-3 “If a thief is caught in the act of breaking into a house and is struck and killed in the process, the person who killed the thief is not guilty of murder. But if it happens in daylight, the one who killed the thief is guilty of murder.”
2. Luke 11:21 “When a strong man, fully armed, guards his own mansion, his property is safe.”
3. Isaiah 49:25 “Who can snatch the plunder of war from the hands of a warrior? Who can demand that a tyrant let his captives go?”
Buying Firearms or other self-defense weapons.
4. Luke 22:35-37 “Then Jesus asked them, “When I sent you out to preach the Good News and you did not have money, a traveler’s bag, or an extra pair of sandals, did you need anything?” “No,” they replied. “But now,” he said, “take your money and a traveler’s bag. And if you don’t have a sword, sell your cloak and buy one! For the time has come for this prophecy about me to be fulfilled: ‘He was counted among the rebels. Yes, everything written about me by the prophets will come true.”
5. Luke 22:38-39 “Look, Lord,” they replied, “we have two swords among us.” “That’s enough,” he said. Then, accompanied by the disciples, Jesus left the upstairs room and went as usual to the Mount of Olives.”