Sounds to me like a falling-down drunk who thought he was breaking into his own house when his key wouldn’t work.
At 82, he’s possibly lucky to be alive....period. What, however, does that have anything to do with the fact that he owned a handgun and knew how to use it to stop and hold a criminal thug?
My wife's sister, a liberal, said she felt so much less threatened by the incident because there were no guns in Australia. I reminded her that criminals still have the guns and unarmed officers showing up 20 minutes latter aren't much protection from a possibly armed intruder.