So...are human shields fair game?
Who specifically was the target and was the kill confirmed?
Or...was this a case like those tales of Vietnam helicopter gunners that “shot anything that moved”?
No, but if your standard is that there can be no collateral damage in a war, you have lost the war before you start.
The main problem is that a large percentage of the American populace have been lead to believe that they need not deal with reality. Reality is that those who do not use force to defend themselves end up as slaves to someone else, or rely on someone else to do their fighting for them. We have been enforcing a fairly effective pax Americana for 65 years, and a great number of people resent us for it.