Wtf does being American have to do with anything? And no, it doesn't make a lick of difference. The given situation was a fighter pilot who shot down a commercial airliner under orders later at some point in his career being given a medal for some completely, 100% unrelated reason. Maybe he deserved to be tried for war crimes. Maybe he also deserved that medal. Can you see that this is not cognitive dissonance?
It wasn't actually. Iran Air Flight 655 was shot down via a SM-2MR surface-to-air missile. Its the first paragraph on the Wikipedia article.
This is an insanely important distinction, since a fighter pilot would have had the opportunity to visually inspect the craft beforehand. Where in this case, the accident was made due to incorrect system information which misidentified the aircraft as being anything other than a commercial airline.
