Regarding the use of the hydrogen bomb to end the Pacific War...
I think the main point, that Stupid Dogg is alluding to, is that our perception of the use of the bomb in Japan not an either/or situation. The bomb killed a lot of people. The other option, a land invasion, would have killed a lot of people. Both ways are awful, but one of them had to be done, and it just happened to be the bomb. The fact that the bomb shortened the war by about a year or two and the number of deaths by at least several thousand does not lessen the tragedy of all the innocent people who got killed because their government decided to start a war with the U.S. Even though it was the right decision that Truman made, all factors considered, it was a shitty, genocidal, tragic situation all in all, and that it was the lesser of two evils doesn't negate the wrongness of all those deaths.