@High Seas,
It's easy when we have 20/20 hindsight, but many things done by our government in our name is done in secrecy and shared falsehoods to not only Americans but the whole world at large.
That's not to excuse what our government has done, but I'm not sure our government will allow transparency to future decisions about how our government decides to do one thing or another.
As for using the a-bomb during WWII, I believe most feel it was justified based on the information that was available then; our potential loss from our attack on Japan's homeland (and their loss too), the fact that Japan initiated the war without warning, the cost the war had already cost our country, and most everybody's wish to end the war.
I also read the book about MacArthur many decades ago, and felt he was the perfect general in charge of Japan after they surrendered, and our occupation of that country.