"There Is No DNA Test To Prove You're Native American"

Bullshit.
Sounds like there are no test results that are sufficient to get you accepted by a tribe. But that's completely different. But if you've got, say, 100% Native American genes, then you're Native American. Nothing about any human decision can change that.
   I don't like Warren. But this anger directed at her by American Indians for proving that she has American Indian ancestry is absurd. Fine: don't accept her into your tribe. Doesn't change her genes--i.e. her ancestry.