I think, almost without exception, we are outraged at these massacres perpertrated in schools and to my mind the reason is that:
They are unwarranted and unprovoked
They involve persons or an age that is regarded as innocent
We find it hard to comprehend the mentality behind these incidents
They are beyond our control.
It is this last point that particularly irks us. An analogy I would draw is our horror at plane crashes compared to road death. Both of course are tragic, but although far fewer people are killed in plane crashes than every day on the road we are more disturbed by areonautical incidents (arguably because of their magnitude): Because they are beyond our control.
So it is with the school and other public place shootings. They are small in the overall scheme of hazzardous situations that confront us and our children everyday of our lives.
However, I have not heard the americans explain how it is they have so many of these incidents compared to other countires where small arms tend not to proliferate the community. I would be particularly interested to hear the NRA's explanation for this. I rather think they would simply say there are not enough armed guards at the schools. That attitude in no way corrects the fundamental problem.
I think we accept, while tut tutting all the way, that criminals have access to guns, but also recognise that mainly they use them on each other. If a bikie wants to waste a bikie from a rival gang, good luck to him ( without condoning collateral damage, which I think it is relatively rare.)
To return to the main point, it is the unbalanced soul that is our problem. If that person gains access to high powered weapons (or explosives) we are in big trouble because it is an unpredictable event.
If any of what I say above has any merit, the first step for gun ownership would be character reference and mental checks. Of course it is not that simple as I think the bloke concerned got his mother to buy the gun for him.
Lastly it must be remembered that guns in the US are a huge business and source of revenue both at retail street level and the international level of sophisticated weaponry. Those interested parties are simply not going to sit back and allow their business to be swept away from them.
Regards
Paul