I'd donate a rifle to the old guy.
Even if the dog is old, and weak, and seemingly friendly, don't corner him. Might get bit.
There exists a rather substantial amount of people who DO look forward to the day they have the opportunity to protect themselves or others. This does not make them bloodthirsty - this makes them optimists.
Different variations but runs along this theme:
"I hope I'm fortunate enough to be in the right place, at the right time, with the right tool, to save some poor soul from perishing."
It all comes down to whether you believe in good and evil. I've seen enough in my life, and read enough of our history of what's come before me, to be 100% convinced there are two "sides" at work in the world. While most of us fall somewhere in the middle gray area, there is a dividing line between good and evil.
Someone who enters another's home - ultimately, our only true safe havens - with the intent of taking what they want by force or subterfuge or stealth, deserves not liberty.
Someone who enters another's home with the intent of causing bodily or mental injury (assault, battery, rape, murder), deserves neither liberty
nor life.
You want to know what the real issue is here?
That man has lived 92 years in a society to see it degrade to the point we coddle and protect our violent felons.
He's sick and tired of "human rights" extending to those who care nothing for the rights of others.
Case in point: I saw on TV today that a convicted murderer in Massachusetts has been granted a sex change operation on the taxpayer dime by a federal judge.
That's the society we've created off the backs of our past heroes, living and dead.
And we wonder why criminals have no fear.