system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 why it is ok to say Brits or Aussies but not Japs?
gpt
Because we were once at war with Japan, and we learned to call them "Japs" then, and so "Jap" became associated with all the hatred that came with war. We are not at war now, so we don't want to be reminded of that hatred, and it is easier to avoid that if we avoid the word "Jap."

By the way, around the same time we called the Japanese "Japs" we were also calling the Germans "Huns"--both words fit nicely into headlines--but that word has disappeared, too.