I think that every time there is a complaint, the local school should rename the team after a European people or tribe, e.g. Saxons, Vikings, Trojans, Spartans, Centurions, Templars, Normans, Picts, Celts, Franks, etc. An occasional Minutemen or Pioneers would also be good.
I wonder how long it would be until their were complaints that all the school mascots were European.