I'd be interested to know why the nuclear attack has been singled out for discussion when the non-nuclear fire-bombing of Tokyo killed more people (approximately 100,000). Does the delivery system really have any significance in comparison to the number of casualties?
I was thinking about this yesterday, but in the context of the whole war. It struck me, and still does, that there was more (strategic) point to the nuclear attack on Hiroshima (and, perhaps, that on Nagasaki) than there was to, for example, Dresden (although I understand that there are those who defend the Dresden attack based on its strategic position with respect to Germany's transport infrastructure).
What Dresden wasn't was any sort of warning shot, which Hiroshima surely was. (What it also was, in terms of the destruction, was one of
very many cities reduced to rubble**.)
So, speaking as a Brit, I see the Dresden attack as much more worthy of being described as a war crime than Hiroshima, as I don't think it either changed the overall course of the war in Europe, or was seriously intended to do so. (I suspect that it was just another ratcheting up of the bombing campaign, almost done because it
could be done, and because it fitted in with the mindset of the time, based on years of escalating attacks on large cities.)
** - As part of a holiday tour in the 1980s, I stayed a night I Hannover. Near the hotel was a museum, which contained a number of models depicting (the centre of) Hannover at various points in its history. The model of Hannover in 1945 showed not a single building with an intact roof. (In fact, I can't recall seeing
any roofs, intact or otherwise.) Hannover was, like Dresden, a transport hub. (According to Wiki, "only" 6000*** people were killed during the many allied bombing raids, which included those on residential areas****.)
*** - An estimated 42,600 civilians died (and 37,000 were injured)
in eight continuous days (day and night) of raids on Hamburg.
**** - I have no idea if these were deliberately targeted: precision bombing was a rarity in those days.