Yes, I do for two reasons. One, the attack on Pearl Harbor was unexpected and innocent lives were lost. Over 2,400 died. America wasn't even involved in a war and we were still bombed. Next, the bombs dropped on Hiroshima and Nagasaki weren't 100% about "revenge." Hiroshima and Nagasaki were military capitals. They produced most of the machines and weapons used in the war. By bombing there, you could cause a sharp decrease in weapons and Japan had no choices than to withdraw. This was better than fighting even more and even more lives lost.
Good luck :)