Terror bombing, whether it was with atomic or traditional bombs, is at best questionable in its effectiveness. The part of the Allied bombing of the nazis that was aimed at damaging morale was probably a mistake, and should be criticized as such, but at least the aim was to defeat the nazis. The atomic bombing of Japan was killing cities full of civilians to make the Japanese surrender to the Americans instead of negotiating surrender through the Soviets. The aim was the imperialist subjugation of Japan by the USA, not ending the war.