Even if you accepted the idea that they were the first human inhabitants of the Americas (they weren't) what exactly is their claim of exclusivity? That they wandered over from Siberia when it was connected to Alaska? How is that any more righteous or noble a claim than when some Europeans wandered over the Atlantic in boats?
It sort of reminds me of Monty Python, when a mob is being whipped up against the Romans. "What good have the Romans ever done, eh?!"