I have never seen any numbers on how many Afgan citizens were killed. I also have not seen if those numbers broke out the truly innocent ones and the ones who took up arms against the US or the ones who when captured and while being search, blew themselves and others up with a hidden grenade. From everything I read, the US went to extraordinary precautions to protect the safety of the general public.
I wonder if you are equally outraged at the lives lost due to car accidents. Do you believe we should ban cars because of the risk to human life? I find the argument that we should never respond to attacks because someone may die - not well thought out.