Fallujah can teach us how to teach better?

[Andrew J. Rotherham] "Fallujah probably isn't the first place you'd go for ideas about how to improve our schools. It was the scene of some of the toughest fighting during the Iraqi War. But the city's successful recapture by the United States highlighted why the Marines Corps is such a respected fighting force."
I just don't see the logic here. How can teaching 19 - 20 year old men to kill men, women, and children, spray them with white phosphorus, and leave a town coated in (depleted or...