Mr Beck found time to obtain a gun. Seems he didn't concern himself with the responsibility to learn fire discipline, in particular to withhold fire when innocents are in that line of fire. This all should have occurred prior to this incident.
You write a good movie character .... unfortunately, there's not always time for that in the world this guy lived in.
That's not an argument, it doesn't even make any sense.
It does however sound like a putdown, which is what it is.
Comeback when you've got something to argue with. You and your girly putdowns are a waste of time.