I do not celebrate it or spike the football.
It just seems to me that a case can be made it was a neccessary evil.
The right thing to do maybe was to provide more warning to the Japanese and the civilian populations what they were facing. The Potsdam conference did issue a statement warning Japan it faced utter destruction if they did not surrender unconditionally. That was obviously a veiled warning about our nuclear capability. But I am sure the threat was not direct and explicit enough for the Japanese to really take seriously.
Did the Japanese give Pearl Harbor a 'Notice'?
