I just watched "Judgement at Nuremburg" for the first time and the moral issues (peaceful post-war Germany vs full retributions for WW II Crimes against humanity) you described were covered very well in the movie.
I also recently watched the documentary "The Adolf Eichmann Trial - Justice in Jerusalem." on YouTube.
Before that I watched "Operation Finale" on Netflix about the Mossad's operation to capture Eichman in Argentina and transport him to Israel for trial.
I saw Judgement at Nuremberg in 1981, and I still recall the final scene between Burt Lancaster and Spencer Tracy. Lancaster, the convicted Nazi judge said he didn’t think the Holocaust would ever happen. Tracy replied “It came to that the very first time you sentenced to death a man you knew to be innocent.”