will any Afghan ever surrender?
Most people in Afghanistan are not soldiers. They are women, children, old men, and so forth. And of course in modern wars, most of the people who get killed are women, children, old men, and so forth.
My point about the Red Cross wasn't that they were aiming for it - but that they didn't see it. (Incidentally, what's a Red Cross doing there in any case? - I'd have thought it would have been a Red Crescent. If so that might explain why it wasn't identified as a non-target.)