The alternative would have been a million dead Americans, and that's a conservative estimate.
”Truman stood by his decision for the rest of his life, yet was deeply troubled by the loss of civilian life in the bombings. This response is, on the one hand, understandable, yet also curious: had not the ‘conventional’ firebombing of Tokyo killed more than the two atomic bombs combined? …
… in 1940, Churchill condemned the German bombing of civilians as an ‘odious form of warfare’; by 1942, England had adopted the policy as their own and Churchill would go on to vow that there are ‘no lengths to violence to which we will not go.’
What was unthinkable had become thinkable and doable. The bombing continued even when evidence suggested that it was not significantly undermining the industrial capacity of Germany to make war. Once adopted, the practice found its rationale in revenge and the infliction of maximum human suffering. Allied leaders felt no need for moral or theological justification for their actions.”
(Christopher Shannon, “Sheen and Hiroshima”)
“… I am certainly happy that the United States won the Second World War and did so without the tremendous liss if life - American, Japanese and Russian - that would have accompanied an invasion of Japan. At the same time, I am sad that this victory came through years of committing intrinsically evil acts.”
(Ibid.)
Christians committing “intrinsically evil acts” - compatible with the teaching of Jesus and the apostles?
We’re back to the non-Christan / un-Christian “the end justifies the means” philosophy.