Comment: Except for the phony "warpaint," this fan isn't even trying to emulate the Seminoles' fake Chief Osceola mascot:
He's going for a pure stereotype: All Indians look the same, and all look like a Plains chief. He doesn't know or doesn't care that a Plains chief has literally nothing to do with a Florida-based tribe a couple thousand miles away.
This is a fine example of how mascots promote false and stereotypical perceptions of Indians. No one's correcting fans like this one; no one's telling them they're wrong. Just the opposite, in fact. Allowing behavior like this, and showcasing it in a newspaper, makes it seem acceptable. The message is that this is what Indians are like.
For more on the subject, see Seminole Homecoming Queen in a Headdress and Chief Osceola Is "Respectful"?