>At that time, the government and military of Japan was almost as fanatical as some of the terrorist groups we see today, and they were prepared to fight until their last soldier.

That wasn't the opinion of everyone, some thought that Japan was on the brink of surrendering.

http://www.dannen.com/decision/bardmemo.html

Even if you could find some justification for the first bomb, use of the second could hardly be justified.