A truly disgusting situation. The term collateral damage comes to mind. It was OK for the British to fry the inhabitants of Cologne and Hamburg with incendaries. And also OK for the U.S. to fry the citizens of Tokyo with incendaries. The fire storms in those cases killed more people than the Bomb at Hiroshima and Nagasaki.
That doesn't make the murder of civilians acceptable, no matter the provocation. Non combatants are supposed to be just that. A child running at your squad with a grenade in it's hand is an old and abysmal tactic, but the tactic is used. It takes a pretty hardened grunt to do the necessary thing, and then he has to live with it.
I don't know all the details of the latest incident, and therefore will withhold judgement.
Especially considering the political stance of the media and The Honorable Murtha..