Re: What was he thinking?
"cause of the madness of gun free zones, or massacre centres depending how you want to look at it"
I've had loaded guns with the safety off aimed directly at me at a range of under 5m on several occasions. In every case the perp was entitled to use firearms, and they were drunk. On all those occasions I had no real warning beyond the fact they were (legally) carrying a firearm, and in none of those cases would I have had time to even raise & aim a firearm without being lethally wounded. The only thing that kept me alive was making sure they understood there was nothing to gain by shooting me, any sign of a gun would have signed my death warrant.
In all those situations I've been on the wrong end of a gun, removing the firearms would have vastly improved my odds of survival. I got lucky, others haven't been so lucky.
Ideally (for me) the lawful use of a firearm should require close (independent) supervision where every discharge of the firearm will be recorded and verified, that firearms may be concealed, but anyone carrying firearms should be clearly marked as doing so and the purpose of the firearms should be declared (and agreed with the supervisory body) prior to use. The purpose of the firearms should also be *publically* displayed on the bearer of firearms (uniforms are already used for this purpose).
Laws pretty much cover all of the above in most countries, and there are knob-ends in most countries too, so the madness is that the supervision/enforcement just isn't good enough.
Having said all that I reckon that keeping folks who can't hold their booze off the streets (or keeping them away from booze) would have a more beneficial effect on the quality of life for everyone everywhere. :)