Dont believe killing innocents were ever in the ROEs, but okay. I do understand that's possibly how they were trained (throw a frag first) in movement techniques to clear rooms/houses, but their orders were definitely not to kill some kids.
On the other hand, i also know the rage you feel when you see someone get blown to hell by an IED. It really sucks if its a friend who dies. So im definitely not judging these Marines, its a situation that you cant speak of unless you are it (myself included). Unfortunately, in the age we live in, these things dont go unnoticed like previous conflicts.