If a group does find the term "redskins" offensive, why don't they, instead of spending money on lawyers, spend money rebranding the word to mean something positive? I'm pretty sure the Redskins organization would be willing to provide funding for such an endeavor.
Oh, wait, that would involve working together to find a win-win solution.
How long do you think a comedian will have to wait before it is safe for them to joke that the "redskins" are just looking for another way to fight the white man? Or, also historically relevant, how the "redskins" are just looking for another way to fight other "redskins?"