Wait a minuite, you don't prefer mutants over roaches ?
The use of the bomb can't be called justifiable when the arguments for it are all based on assumption. You can say definately that it shortened the war, but you can't say with any ammount of finality that a swift surrender could not have been agreed without it, or that the bombs saved as much as a single life.
Of course it matters in such a massively destructive war who started it, and of course it matters what their motivations were, but on all sides considerations for civlian deaths were overshadowed my military necessity as a matter of course. At the time of the bombings Japan was contained, unable to respond.
Military necessity was nolonger as prominent with the outcome nolonger in doubt, but the Americans nuked Japan, and Bomber Command continued to hit civilian targets even long after any consideration of german production rates was an issue. Politicians should have stepped up and put an end to it, but the politicians themselves had become the generals.