good and evil are suposed to be totaly relitive, right, so isn't the only thing that realy matters is who wins?
now that said even with this we still have the 'moral high ground' if only because we don't take this stuff to the same degree or for the same motives as the enemy. we through people naked in a cold room with loud music to get information, they behead people because there infedels.
if you want to look at it another way, they kill us on the battle feild, does our killing them on the battle feild make us just as bad as them?
if we were on there moral level we would have literaly nuked the whole middle east.
but hey, why don't we just through around some more metaphores rather than actualy try discussing the situation, it's a lot easier than actualy thinking about it, and a lot more comfortable than questioning if you might be wrong about something unpleasent.