Other cultures think we are fools. Morality as applied to the topic at hand 'should' dictate that we look at the whole picture, not pieces of it. Even the ones who have the right to point fingers realize that we best just put it aside, the supposed guilty party has punished himself and will be punished in the future as a result of all this. Unless you believe the current government of Vietnam is illegitimate and has no right to make that request. Again, unless you were there, you cannot make a valid judgement.
Terrorism is a powerful tool.
Some thoughts about Kerry. Read the current Vietnam regime's take on it.