This article from the American Spectator ignores the fact that, at least one branch of the military -- the Marine Corps -- was forced to make serious reforms in recruit training after several incidents, including a few of killings.
I graduated from Parris Island in the 1980s so I know a bit about it. Marine training is indeed tough. Things may have changed, but when I was in, nobody in my platoon was killed. Nobody was subjected to the moral depravity evident at Abu Ghraib. In fact, one drill instructer was relieved from duty after a recruit made charges against him.