Robert Oppenheimer was said to have remarked, on witnessing the first atomic explosion, "Now I am become Death, the destroyer of worlds"(quoting the Bhagavad Gita).
I don't recall reading that Oppenheimer was against the initial use of the bomb, but he was suspected and the target of McCarthy's squad for his comments after the war.
As a side note, I recommend Richard Feynman's excellent book "Surely you Must Be Joking Mr. Feynman", a serious/whimsical memoir of the time building the bomb at Los Alamos.
Robert Oppenheimer was said to have remarked, on witnessing the first atomic explosion, "Now I am become Death, the destroyer of worlds"(quoting the Bhagavad Gita).
I remember quote from "the Hunt For Red October." But to your memory was there anyone who said "Germany yes, Japan no."
I have the Feynman book here somewhere. Very entertaining. I don't remember anything about reserving the bomb for Germany only though.