I have mixed feelings about this particular incident. I am glad it all went well, I do believe in a person’s right to arm themselves, and I am glad they aren’t pressing charges against the old man.
That said, it is possible he took an unwarranted risk with other people’s lives. What if they had returned fire and hit a bystander? What if they had backup standing outside? Risking your own life is one thing; risking the lives of those around you is another.
Now, if he genuinely believed it was likely they were going to shoot people that is a different story. I wasn’t there so I don’t know what the “vibe” was. I am not saying he was necessarily wrong. I just don’t want people to think that just because one is armed, that drawing on thieves is always the right choice.