Annoyed In St. Louis

"A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms shall not be infringed." No where in there does it state that we have the right to show up in a public institution and open fire on innocent and unarmed people. The man who walked into the Holocaust museum with a shotgun was not a part of the militia except in his mind and had nothing to do with the security of our free state. Part of the reason the military works is because the soldiers work in concert with each other and under the direction of their commanding officer. Renegades, vigilantes and other mercenaries are a liability. Giving handguns to anybody who wants one because it is constitutionally allowed is irresponsible and puts citizens in harms way. I say if you want to join the military to protect our interests, enlist. I understand that you have a right to protect yourself and your property and that no doubt you are a responsible, non-violent human without a vendetta. However, I don't believe for one minute that people buying assault weapons, rocket launchers and armor piercing bullets give a damn about a renegade government.