His mother could have had no guns, or a thousand guns. The guns were not the problem, he would have just found another way. Possibly even more devastating.
Guns are used by those who want to be martyrs, people who want to get away use bombs, Oklahoma City, Boston. But he could have just as easily used a suicide bomb, as the jihads have done in Israel where many of the public do carry. Bombs are a way for them to still do devastation without being stopped by a LAC in Israel.
IRA was one of his interests, and they used bombs. I doubt he was not aware of their tactics, or the tactics of terrorists in ME countries, where bombs were used considerably. As bad as this was it could have been much worse if he had gone to the next level, and used something other than guns.
Nothing will stop these events, other than social changes. That will take restraint on the medias both news, and entertainment. And if we stop meddling in other sovereign countries we would eliminate the crazies using that as a excuse. Let Russia, and China deal with it for a change.
We bombard our youth with violence, instead of hunting, or playing games outside they spend hours killing people in video games. For Hollywood being anti gun they have no problem with violent movies, and TV shows. It is bad enough that we portray a image of violence on screen we also make it look like everybody gets laid, a lot. People a few bricks short of a full load don't get it is not real, and probably are angered that they are not getting what they think they deserve.
I don't condone violating 1st amendment rights any more then second. But like the second the users of the first must show responsibility. I am not for censoring, but damn it, put some of the blame where it belongs. Shun-icky them.
OK off my soap box rant now.