@Fazoo Your comment is just "The Rape of Nanking." You were commenting in response to me not wishing to comment on Japanese War Crimes. Yes, I've heard of it. Yes, I had to look up the details.
My original point was that it didn't matter what a country's government had done before when weighing the morality of dropping an atomic bomb on a city, and because I don't know details about Japan I used Britain as an example because I can list off colonization sins by the British Empire. Your response implied that I should specifically address Japan and Nanking. I did. I clarified to you that the US dropping an atomic bomb on a city had fuck-all to do with Nanking, so Nanking has nothing to do with the conversation at hand--the morality of the US dropping a bomb on an atomic city. Then I told you that war crimes in retaliation are still war crimes even if it had.
If you meant something else... What was it? That I had to be qualified to comment on Nanking? I'm actually not, because I didn't know the details until I looked it up on Wikipedia.