"And if I had been fully aware how commonly—particularly in the B-29 raids over Japan—we were imitating Nazi terror bombing practices, how would I have reacted? I don’t really know. Perhaps any concerns would have been quieted by the thoughts that they had started the war and the bombing of cities, that retaliation was fair and necessary, and that anything that would help win a war against such atrocious foes was justified. Those same thoughts might have reassured me about the use of atomic bombs on Japan, as they did for most Americans, if it hadn’t been for an unusual classroom experience I had had in the last year of the war."
January 1, 1970
https://en.wikiquote.org/wiki/Bombs