So being a Native allows you to speak for the rest of the tribes and multitudes of individuals that make up that tribe? Psshaww. Get that shit out of here, son. You're like the minority of black folk who's like,"I'm not black! I'm African-American."
An exerpt from
http://www.narf.org/pubs/misc/faqs.html
Why are Indians sometimes referred to as Native Americans?
When referring to American Indians or Alaska Natives, it is appropriate to use the terms American Indians and Alaska Natives. These terms denote the cultural distinction between the indigenous people of the continental United States and those of Alaska. While the term "Native Americans" came into usage in the 1960s out of respect to American Indians and Alaska Natives, usage of the term has expanded to include all Native people of the United States and its territories, including Native Hawaiians and American Samoans.
I'll give you your due with the West Indies stuff, but I'm still sticking to the In Dios theory.