You clearly have had no firearm training of the type that one gets when qualifying for a carry license.
You can choose to align yourself with the Black Panther types who show up at school board meetings with their guns, but if I'm in a restaurant and a bunch of guys brandishing guns walks in, I'm leaving if I can, and doing what I need to if I can't. Some of us remember the guy who open carried into the Luby's in Killeen.
The fact that carry usually requires training, and that this may contain a piece of useful information about the lawful use of deadly force in no way contradicts my point or makes yours.
You said that merely carrying at a graduation deserves to be punished with violence. I disagree, and believe that carrying should be a civil right even at educational institutions.