Its a political post so my politically loaded question should be forgiven. Wouldn't it have been acceptable, if United States had liberated North Korea instead of Iraq?
At the time the Bush Administration got invasion-happy, it believed that Iraq almost had nuclear weapons. (In retrospect it looks like they weren’t that close, but let’s assume the Administration believed its most pessimistic intelligence reports.)
North Korea, on the other hand, already had nuclear weapons, not to mention a conventional arsenal that, as others on this thread point out, can lay waste to the South.