You would think that if it was a slur, more than 9% of the people it's a slur against would be offended by it.
This is tantamount to "I have a friend of x ethnicity who said racist shit is okay... so it's okay."
If Native Americans living on typical dilapidated reservations, in a state of poverty, or lacking meaningful education were asked, then the 9% would unfortunately make sense. It's easy enough to oppress an entire people's history to a point when they don't realize when they're being treated like shit, same as in the past. I'm sure you could find plenty of African-Americans nowadays to justify blackface minstrel shows. In fact, many blacks fully supported them during the mid-1800s, slave and free alike, before and after the Civil War. Point being that it doesn't make it okay.
Also agree that dwindling popular use of a racist epithet isn't a green light to reinstate its use.
edit: Squirrel Killer, that's exactly what you said.