It's true we lost the moral high ground after use of the nukes on Japan, but looking at what Truman faced in 1945, i probably would've done the same thing. To compare the moral depravity of state sponsored genocide where the death ovens at Aushwitz/Birkenau were topping out at 2,600 per day or 80,000 killed per month and the aerial bombardment of civilians is looking at different scales.
The "Final Solution" was the policy of only one country during the last century, and it wasn't the U.S. My beef is with the multi-national business cartels that allowed it to happen, the top being IG Farben (now BASF, Bayer, among others).
Not only did they finance Adolf, they supplied him with Zyclon B for use in the death camps. The American side of the company was not tried at Nuremburg, although they were just as culpable, go figure.
The fire bombing of Dresden by the 8th Air Force and RAF Bomber Command, caused the destruction of 15 square kms including 14,000 homes, 72 schools, 22 hospitals, 18 churches, etc. with a conservative estimate of around 30,000 civilians killed. At the time, the Germans used it as propaganda to advocate against following the Geneva conventions and to attack people's perception of the Allies claim to absolute moral superiority. The military claimed the railroad center was a military target, which it was, altho it was up and running a week later. Feb 1945 was only 3 months away from May 1945 (end of the Euopean war), the outcome of the war was not in doubt, so why bomb a 'cultural' medieval city of 600,000?
The firebombing of Dresden and nuclear destruction of Hiroshima and Nagasaki were war crimes, genocide should also include civilian victims of aerial bombardment. Even after saying this, i still don't think the Allies were close to the moral depravity of the Nazis and their wholesale holocaust of the Euopean Jews.
The bombing of civilians is a great tragedy, none can deny. It is not so much this or the other means of making war that is immoral or inhumane. What is immoral is war itself. Once full-scale war has broken out it can never be humanized or civilized, and if one side attempted to do so it would be most likely to be defeated. That to me is the lesson of Dresden, Hiroshima and Nagasaki.