I think you're just picking the wrong place to fight the PC Police. I get the idea behind that, but you keep beating around the bush here because there's no conclusion other than that the word is offensive. You keep saying that I don't get to decide, but I'm not. You say its up to the Native Americans, but they have spoken. So then you demand better data because you know it doesn't exist.
The only person in this discussion who as said it is not offensive is @MS256. The rest of the supporters just say "well, I don't know that NA's are offended and until you prove that they are, I won't agree that Snyder should change the name." That's hogwash. Its a rope-a-dope. You know the word is offensive. The dictionary says so! You know NA's are offended, many have said so! 4 guys Dan Synder found in Arizona doesn't disprove that.
A wise man once said, "You gotta know when to hold em, know when to fold em, know when to walk away, know when to run..."