In April, a New York Times piece on the U.S. military’s PowerPoint culture generated a fair amount of buzz, especially considering it included a simple, cutting indictment from Gen. James Mattis, then-commander of U.S. Joint Forces Command: “PowerPoint makes us stupid.” The military still relies heavily on PowerPoint presentations, however. And while that may never change, one Army colonel assigned to an International Security Assistance Force headquarters in Kabul, Afghanistan, has had enough. His brutal critique of military culture is burning up the Web today after being published by the UPI news service. An excerpt: For headquarters staff, war consists…