What is the meaning behind this quote? “I do not believe, from what I have been told about this people, that there is anything barbarous or savage about them, except that we all call barbarous anythin

What is the meaning behind this quote?

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“I do not believe, from what I have been told about this people, that there is anything barbarous or savage about them, except that we all call barbarous anything that is contrary to our own habits.”

― Michel de Montaigne, The Complete Essays

What examples can I find of this from tv, movies, books, or social experiences?