Robert sounds like the kind of guy who hides behind his guns and a bastardized version of his religion in order to pretend that the world isn’t leaving him and his ilk behind. Despite his entirely undeserved rage (fueled most likely from his own mistakes in life, which he will never own), he probably doesn’t have the guts to shoot someone, except by accident. Safe money is on him never having been more than 50 miles from his hometown.