I believe that: while it is right to question the legality/morality around the US action against Osama, there are other equally-suspect US actions which are ongoing: capital punishment of the mentally ill, joy-killings in Middle East, over-imprisonment of blacks, confused immigration policies, etc.
So... I'm not going to spend much time debating this particular event; there are others which deserve attention and I'm not offended that Osama has been killed and that some questions remain unanswered.
Yes, I'm American.