So the gun shop owner won't sell guns to those who might do harm to fellow patriots.
Who was Chris Kyle shot by?
Guy just painted a target on himself for lawsuits.
While you make a good point, crazy people are everywhere. The difference is, that muslims are supported, paraded, funded, armed, protected, and encouraged by their theocratic govt.'s to kill the infidel. Just who do you think the infidels are?