There is a certain point where you have to say us or them.
The bombings were tragic, horrible events in world history.
But we also have to remember that Japan was the agressor in the war, and that with the general stubborness of the people there at the time, any sort of invasion would have been a major mess, like Vietnam and Iraq. This being AFTER we took out their army, which would have been no small task.
The bombs were the best choices.