[Captain Beefheart]

When all of Europe's "empires"(England, Spanish, Portuguese, French, Belgian) have colonized, eradicated, polarised half of the world, would you expect less? In the three largest countries with immigrants primarily from Europe, the majority of "argentineans" are not decended from Spain, the majority of "brazilians" are not decended from Portugal, and the majority of North Americans are not decended from England. Still, that small oligarchy from each of those respective countries are running the show, and have been for centuries, and have violated all types of human rights to maintain that control. They have managed somehow to convince people that they should be proud of their heritage and the color of their skin, when in fact most of them are actually mestizo or mulato, mixed(it's particularly true in countries where openly admitting to having African or Indigenous blood carries an ugly stigma, Peru and Ecuador are good examples) and they get a rude awakening and reception when they reach Europe or the United States.

As for Australia's case, I suspect a large part plays in their isolation in regards to the rest of the globe.