In my opinion there is only one way to fix the type of stupid she has and guns help out a LOT with that.
And "gunnuts" are not more likely to kill their family with a gun than a criminal, a criminal is more likely to kill a family without a gun. If you have a gun you are more likely to prevent this when you kill the criminal. If you carry or own a weapon, you should know how to use it, plain and simple.