I never really considered it racist. There are plenty of sports with names from plenty of specific people's. But I guess "redskin" is the one that has a more derogatory history and I can't think of another name that is specific to a skin color/term.
I think with this getting bigger each year and a new round of legal battles over trademark, it will forced by the NFL to be changed.
Though I wonder how many Native Americans really feel this is derogatory as compared to those who embrace it.