Is there a Wikipedia list of obscure 'race'-isms? I find reading about other cultures or other time period's biases to be informative and wonder what the common elements might be.
Off the top of my head, issues I can think of where an outsider may be oblivious between the "sides" are:
Indian caste
Japanese Barukumin caste
Protestant/Catholic in Europe
Jewish people in Europe/US/USSR
English Class System, or Southern/Northern
Jim Crow, or North/South or Midwest Vs coastal, WASPs, or Nativism.
Off the top of my head, issues I can think of where an outsider may be oblivious between the "sides" are:
Indian caste
Japanese Barukumin caste
Protestant/Catholic in Europe
Jewish people in Europe/US/USSR
English Class System, or Southern/Northern
Jim Crow, or North/South or Midwest Vs coastal, WASPs, or Nativism.
Ainu in Hokkaido.
Ukraine vs Russian is topical at the moment.