The confusion seems to stem from the definitions of the words "nation" as opposed to "county".  Nation means a population united by birthright.  A "country" is a political entity.  Natives want it both ways: as nations within Canada when it suits them, but also as independent countries from Canada with closed borders.  Of course, it doesn't work that way and terrible social problems are the consequence.  There are not 600 native countries in Canada but they want us to think there are.