Max Rockatansky
Die dulci freure
You know that was sarcasm, right?
You know that text is a very poor form of communication since it lacks inflection, body language, tone and other cues used in normal human conversation so things like jokes and sarcasm don't carry well without an emoji to indicate such things.
As it is, if someone had a gun, the murderer may have been stopped long before the police showed up. Do you agree or disagree?
Disagree. The presence of a "good guy with a gun" doesn't cause shooters to turn tail and run.
Such shooters are cowards. This is why they don't go after groups of people with guns. When was the last time a mass murderer attacked a police convention? Take your time to research it. If you find one, great. If you don't, then consider "why".