I think "Country" had less to do with it, then the numbers of targets available. There has been little said about motive, since little is known about the shooter, and nothing about how long and where this event was promoted. The attack happened on the last day of the event during the performance of the last act. Jason Aldean has a large following, and this mutt waited until then to launch his attack. He intended and achieved maximum carnage. Had it not been for the quick response, (15 minutes by most accounts) the body and casualty numbers would have been much higher.