"...The flaw in random and anonymous polls of Native Americans' opinion is that they must rely upon self-identification to select the target group. In an editorial in the Bloomington Herald Times, Steve Russell (an enrolled Cherokee citizen and associate professor of criminal justice at Indiana University), states that both the Sports Illustrated and Annenberg's samples of "self-identified Native Americans... includes plenty of people who have nothing to do with Indians".
The problem of individuals claiming to be Native American when they are not is well known in academic research, and is a particular problem when non-natives claim Indian identity specifically to gain authority in the debate over sports mascots. In the Annenberg Poll, respondents were asked their race however, before being questioned about the teams' name.....
At the Center for Indigenous Peoples Studies at California State University, San Bernardino a survey has conducted of 400 individuals whose identity as Native American was verified, finding that 67% agreed with the statement that "Redskins" is offensive and racist. The response from non-natives was almost the opposite, with 68% responding that the name is not offensive.
Redskin (slang) - Wikipedia, the free encyclopedia
Soo...67% of 'authentic' Indians are offended by the use of redskins.