I really wonder what the author meant with this line. There's very few populations in Europe that bear any similarity whatsoever with the relationship between First Nations people and most Canadians, since most populations in Europe have created their own states. And the few tribal populations in Northern Europe generally were and certainly are today treated at least as fairly as anything in Canada. So who are they talking about? Would the Basques feel that they would be treated better as First Nations people in Canada than they are today in Spain?
Note that the treatment of immigrants is a completely separate topic in the article, so I don't think they could be referring to, say, the treatment of Syrian refugees with that sentence above.