Hotel Rwanda pissed me off. I got into a huge argument with my sister (Bach International Relations from a sandstone uni), that the UN Troops should have massacred them. My sister said that they couldn't which is utter tripe.
They've got guns, they're issued ammunition, they could have wiped them out. My sister came up with the nonsense argument that they were ordered not to shoot unless fired upon directly. However an order is just a few words, you don't HAVE to pay attention unless you WANT to. No human is physically forced to do anything they don't want to do by words alone, you've gotta stop yourself in those instances.
Sure they'd be court marshalled, but they'd have clear consciences.