Who committed hara kiri due to being discriminated, whether race, gender or rank etc? Only those who are mentally ill and have a history of psychological problems would do that. Race has nothing to do with it as most normal people have experienced this in their lives. As long as you are in the minority whether in a country, community, group etc, it could be race, facial features, being poor, being an orphan, of different religion or different gender etc., etc., anything can be use to discriminate someone.