I'm trying to figure out who is offended, not the Native Americans, it's white liberals that have the issue.
Well, I presume most negroes agree...Not on principal, of course...but mainly because it agitates and inconveniences the white man and is a chance for them to thumb their noses...
It's like "negro"...for hundreds of years it was used as the polite term for people of the negroid race...negroes decided they didn't "like" it anymore and they wanted to be "black"....then it was "african-american...it's all a ploy to manipulate people by becoming selectively "offended".
It's called "incremental creep" ...now it's "redskins"..if they succeed they'll move on to something else to be "offended" about and that simply MUST be changed!
As they've learned that they can manipulate people with emotional appeals it'll continue and grow.