According to Ayn Rand and many of her cult's followers like Alan Greenspan, the First Nations didn't "use the land correctly" therefore they were invalid occupants.

Colonialism will use any sophistry necessary to murder and loot.

maybe they should defend themselves by bulldozing entire cities and reclaiming the territory

Imagine if indigenous people started stealing lil white kids from their homes, forcing them into indoctrination schools, and then destroying all history of whatever cultural heritage generic white people can claim.

People would lose their minds