The tragedy of Hiroshima could never be justified. The war was nearing a prompt end, Japan was clearly already losing, everything would've been fine for America. The fact that Harry S. Truman decided to drop a nuclear bomb on Hiroshima anyway and instantly eviscerate 80k people instantly and leave so many more people with an even worse fate of dying slowly and painfully of either acute radiation poisoning, or one of the many illnesses that exposure to a nuclear blast like that could give should make America ashamed and we should always remember it as a grim reminder of the consequences of nuclear war.
Fat man however is just commitment to the bit, so you kinda have to respect it.
I disagree. It is true that Japan had no way to win the war and that they were basically defeated by the time we dropped the bombs, but history shows that we have no clear understanding when they would agreed to surrender unconditionally. Japan was desperate for negotiations even after the Soviets invaded Manchuria. There is still a belief by many that total war was on the table for Japan had the allies gotten to a point of invasion, largely driven by beliefs held by War Minister Korechika Anami. Japan would have lost the invasion, yes, but at the cost of at least 500,000 lives, both allied and Japanese.
Additionally, the mentality among the Japanese was so strong at the time that even after the first bomb was dropped, Anami went on to speculate that the US only had one, implying he and the other two hawkish ministers were likely fine with continuing the war until they literally had no other choice. I believe the emperor's involvement in ordering they accept the surrender terms to be the most convincing argument here. Two bombs had been dropped and a superpower had just announced that they'll invade your occupied land, yet that was seemingly not enough to warrant an agreement to surrender immediately.
Based on Truman's diary, I do believe he wanted to drop the bombs just to see what would happen. I don't believe he felt it necessary for Japan to surrender, but I do believe they were instrumental to Japan's surrender even if it came from the emperor and not his actual council. What the dropping of the bombs did allow for, though, is for people to forget how brutal imperialist Japan was. One countries war crimes single handedly washed away the others. I don't know about you but I don't remember learning about how many Chinese and Russian citizens died at the hands of Imperialist Japan, and growing up it was always my understanding that we went too far, but the image below is what ultimately led me to change my mind.