How dumb can they be?
First thought that came up for me was if they didn't want to kill the herders, then just march them along with them till the top of the mountain when their extraction was guaranteed before freeing them. Geeze, talk about inability to think out of the box.
Also, what's with the Rambo body count? In the real battle apparently it was less than 20 Taliban that ambushed them. Seems like they upped the body count just to make this failed mission look more heroic and less of a massive fail.