They are talking about the great nation of Zubralia- a land of infinite resources, untapped potential, and morally perfect leaders who never cheated an election or misused public funds and were living in pure utopia until those exploitative Westerners turned up. Just sunshine and rainbows until Outsiders came and ruined everything.

I'm mostly familiar with Aztecs before the Spanish empire (please research it and go beyond the common place "but they were savages"). They weren't perfect, they were not free of imperialism themselves, but they were rich, functional, had cleaner cities than Europe, efficient commerce and a complex culture. After La Conquista all indigenous people became slaves, were exploited and to this day those ethnic groups are still marginalized. Then what about India before the British? Or Hawaii before the US?