See, if they had actually killed someone who was actually a bad guy, and in the course of it managed to kill others, it still looks pretty bad, but if we can show that they were using said innocents as human shields, you could maybe make your arguments hold water. But they killed an aid worker who had nothing to do with those bombing attacks, and in the course of doing it, they killed a bunch of children, too. There is no excusing that, and it is really, really stupid for you guys to keep making excuses for it.
"So we let the bad guys get away?"
Yes. And never forget that part of the reason for that is because we seem to have a lot of trouble making sure the people we're targeting are even the bad guys.
You keep bringing up the costs in terms of manpower and equipment, and again, yes, the use of drones has made it a lot cheaper for us to make these mistakes. If it cost us more, maybe we'd be less willing to make them.