How does the Sealand woman justify the killing of the Waknuks and the Fringes people? What does the Sealand woman say about the fate of her own race?

The Sealand woman uses a Darwinian justification to claim that her "species" are simply more evolved than people of Waknuk. The more evolved species have a right to protect themselves as well as natural selection justifies the eradication of them.