Genocide is about as far from moral as a human can get. The US did the Geneva Convention and Nuremberg trials, yet the world will never forget Hiroshima and Nagasaki. History shows that evil controls empire.
No pity for the Japanese here. My father saw first hand what the vermin did, and knew full well they had the support of the Japanese people back home, and many of them in the U.S. He also knew first hand what an invasion of Japan would entail, and dropping the bombs was indeed the right thing to do, no matter what the modern day revisionists keep trying to peddle just to bash Roosevelt and Truman.
In any case the fire bombs did three to four more times the damages and deaths, and yet they still didn't surrender, and they still had millions of troops in the field st the time, and it's a certainty that they would have dropped them if they had them, and so would the Soviets, the Germans, and everybody else. The fact they all knew we will use them is the direct cause of why nobody has dropped any since, just a fact.