[edit]I started writing this when there were no replies, I hit submit, "there are 24 new replies" this should be understood in the context of addressing the OP and no one else.[/edit]
well, seance you brought up one bad thing that happened in WW2, let's put it into perspective of the other things that had happened. WW2 is a classical example of what is known as
Total War, a class of warfare defined by one or both sides of the conflict putting the entirety of there resources into destroying the fighting capacity of the other. in this form of war industrial targets are considered valuable because they are were ammunition and weapons are manufactured, workers are considered valid targets cause they build the weapons, ammunition or in some other way contribute to the economy that is fueling the war effort trying to kill you. for similar reasons wearing down the productivity of workers via any means, including psychological trauma is also considered helpful.
Now, because everyone already hates Nazis I won't bother mentioning much from Europe, but
stratigic bombing did happen in the European theater, many cites were reduced to almost complete rubble. also your question is in a vacuum because if we hadn't developed the bomb it does not mean other nations would not have, the Nazis were working on it too.
But the main interest here is US vs
Japan.
obviously the first thing to mention is that
they started it, with an extremely effective first strike that crippled the US pacific fleet. following this raid Japan had domination over all of asia india and the vast majority of the pacific.
"Over this vast expanse of waters Japan was supreme and we everywhere were weak and naked" - Winston Churchill
Japan made good use of it's monopoly on power and the US's decision to focus on Europe. Japan managed to get ahold of, Korea a good sized chunk of China and after the pearl harbor attack they gained control of the Philippines. in the countries Japan occupied they did many many nasty things, they enslaved, raped, and slaughtered everyone they defeated. to this day China and Korea _HATE_ Japan for the **** they did in the first half of the 20th century. but this is about the US bombing Japan. well for my money I'd put the
fire bombing campaigns on a higher plane than the nuking. under similar campaigns cities like Toyama, Tokushima, and Fukuyama were pretty much completely destroyed. even after all this devastation, the Japanese would not surrender, which in spite of all the nastiness they did, I must give them some props for. however, this meant that it was going to take a
land invasion of japan in order to win the war. that was going to result in a vast death toll, a literal ocean of blood, for both sides. there was no question at this point if the US was going to win or not, the only question was how much blood was it going to cost. personally I think what happened was the best resolution to the situation, the death toll was a quarter of a million IIRC, a full scale land invasion would have easily killed 16 times as many people, and I'm not even including the US deaths here.