All my life I've noticed the little 2" newspaper notes describing a Muslim somewhere on the globe going on a one man killing spree, usually with a machete, except in rare cases where he might be a cop with a handgun or something. Some people here can ask their grand fathers about military duty in the Philippines in the 30s and 40s, my point is we will begin to see these attacks by individuals in a random, violent final act more often. Mass Murder, it's not just for the post office any more.
You're right, it's just another isolated incident.
WARNING: extremely graphic images of muslim killings