Dementia combined with pent up anger and rage.
A false sense of righteousness -- that everyone would see things his way because he had a gun.
You make a lot of sense..
Who kills someone over bad manners?
The young father may have said something.. like .. hold on I am texting the babysitter.
Senseless murder...... makes me sick.
I am wondering if he went to his car to get his gun.. Why couldn't he wait a moment to speak with the theater Mgr?
He went to management.
Did he? Then why not wait until they could address his problem.