None. Who said they did? That's not the argument that is being made. Also, what rights did the first Canadians have? Or the first US citizens? What gives this nonexistent entitlement moral color?
It's so weird to me that people think that, by virtue of the geographic location of their birth, they are better than someone else in need and, because that person isn't a citizen jus soli, the government should be required to treat them like vermin.
That's true. But there's a difference between observing the objective fact that the Canadian government isn't required by international law to do what they are doing, and what you all are doing, which is making an indignant normative objection and calling Trudeau a sissy boy for not being a piece of shit.
There's about nothing more pathetic than a Canadian dissident who, despite seeing their neighbors to the south deal with corrupt, incompetent, selfish, and immoral leaders, want to remove Trudeau because the dude has a heart and "omg he's too nice, what a cuck. A real man would let those worthless brown people starve to death, or leave them to drown in the Mediterranean like the Europeans did."