Since you and others are at the mind set that guns are contributed to violence and it is a factor in violence then we would have shooting are the time at gun stores
Guns do not cause violence it is just a tool that can be used in a violent act
Question when have you ever herd of a gun store getting robbed you don't because even the insane know that there will be people armed in those stores
People do not go into a place where they know people will be armed to commit a crime.