There's a quote in Lenin's The Right of Nations to Self-Determination that I'm quite fond of, not least because it concerns the country in which I live.

The close alliance between the Norwegian and Swedish workers, their complete fraternal class solidarity, gained from the Swedish workers’ recognition of the right of the Norwegians to secede. This convinced the Norwegian workers that the Swedish workers were not infected with Swedish nationalism, and that they placed fraternity with the Norwegian proletarians above the privileges of the Swedish bourgeoisie and aristocracy. The dissolution of the ties imposed upon Norway by the monarchs of Europe and the Swedish aristocracy strengthened the ties between the Norwegian and Swedish workers. The Swedish workers have proved that in spite of all the vicissitudes of bourgeois policy—bourgeois relations may quite possibly bring about a repetition of the forcible subjection of the Norwegians to the Swedes!—they will be able to preserve and defend the complete equality and class solidarity of the workers of both nations in the struggle against both the Swedish and the Norwegian bourgeoisie.

What exactly is the difference between Norway's case, and the case of the Indigenous nations of Turtle Island? As I see it, the difference is quite simply that all the land of Canada and Seppoland is ill-gotten, whereas only about half of modern-day Sweden (and indeed modern-day Norway) is — this is to say that there was a border on one side of which was Sweden and on the other side of which was Norway, whereas on Turtle Island, the subjugating and subjugated nations are coterminous. But the fact that the collective secession of every subjugated Indigenous nation would reduce a subjugating settler-colonial nation's territory to nil, simply does not negate the duty and need of workers of the subjugating settler nation, to recognize the right to secession of the subjugated Indigenous nations: any worker who would deny this right is, as Lenin put it in A Caricature of Marxism and Imperialist Economism, a social-chauvinist.