I think the main reason for the discrepancy is that Nazis were active in Europe, which was culturally much closer to the US than East Asia. For example, we hav

I think the main reason for the discrepancy is that Nazis were active in Europe, which was culturally much closer to the US than East Asia. For example, we have a lot more literature about the Holocaust than about Japanese atrocities in the Far East. One of the reasons is that the European population of the 1940s had much higher literacy levels and so there were enough people to actually write their experience down. But it is also way easier to translate from, say, German or Dutch into English, than to do the same for Tagalog or Burmese.