^ You haven't been paying attention, have you? The word is a racial slur because it was originally a reference to Native American scalps being collected and used as bountys, as proof of killing them. This is documented and proven.
Simply claiming that it's a reference to "red skin" as opposed to white people's "white skin" is, as I also just said, imposed on Native American culture after the fact, by European writers. (Native tribes generally did not keep written records, so there is no proof that they ever used the term in such an innocuous manner.)
That is absolutely not the orgin of the name. The Washington Redskins were originally from Boston. The name was inspired by the settlers who threw the "Boston Tea Party" pretending to be Indians by dressing up and painting their skin. You are mistaken.