Do you mean that the fighters were of an ethnic minority that apparently had a higher cultural acceptance of violence, or that the fights were ethnic conflicts?
it was "russians" vs "maroccans" (actually all of them jews). fights were between kids that were troublemakers anyway on either side of equation. usually as follow up to some slur like "dirty russian" and whatever could be thrown into other direction.
but there were only like 2 or 3 of those fights over 4 years in school. rest of time it was quiet
