Once again, Anita makes a good point but hides it amidst quite a bit of inverted misogyny.
As a nation, we have tied violence and masculinity together as if they were two sides of the same coin. Society may say, quite frequently, that violence is not the answer, but then the various authority figures will call such a thing "for pussies", and say that real men blah blah blah guns.
When you teach people that violence is an acceptable answer to a problem, then people will use it to deadly consequences.
Maybe we should start teaching men to be "more like women" while we're teaching women to be "more like men."
...Quotation marks because, obviously, gender roles are bullshit.