You've got an ex-cop who thought he was above the law.
He can break theatre policy by bringing in a weapon contrary to posted sign and then use it on another patron who didn't break that law.
That is what you are arguing for -- give it up.
Do we at least agree that the victim did break a law? That throwing popcorn into another person's face is a criminal act?
Was Zimmerman guilty because unarmed Trayvon was only bashing George's skull into concrete and not threatening him with a gun?