It's like blaming drink-driving on easy access to cars.
Simon, I usually agree with a lot of your comments but I think comparing drink driving to gun violence is a classic strawman argument.
Perhaps the similarity of the two examples could be seen if it were said that a contributing factor to the drink-driving problem is the easy access to alcohol rather than an easy access to cars and that a contributing factor of the mass shootings is the easy access to bullets instead of guns.
The thing is, alcohol and cars have always been available to the public but the difference now is that there are the increase in the drink-drive problem is because there are more drivers on the road and the odds of there being a drunk driver among them is higher and so is the likelihood of them accidentally hitting someone on the crowded roads.
Similarly, guns and bullets have always been available here in the U.S. but the troubling thing is that something has changed recently in society itself, to cause the use of guns for intentionally killing people in public places, to become a trend.
I feel that the things I mentioned in my earlier post, as well as a trend toward a victim mentality and to blame others for ones problems, coupled with the availability of guns, could be the perfect storm that is taking place and resulting in what we are seeing.