I think it's silly that a lot of the groups go after any team that choses any Indian mascot.
Having said that, I do feel the Redskin name can be deemed offensive because it's referencing a slang name of a group of people. Because of that I do think the Redskins would be making a good decision to change to something that isn't negative like Indians or Braves.
Teams that have names like the Seminoles, Indians or Braves should'nt be offensive because a team is honoring these groups as strong people by choosing them as Mascots.
On the flip side, if the Redskins did change their name, you can bet that unfortunately some groups would use it as a stepping stone to increase the racism angle and force other teams to give up even respectful Indian mascot names.
There is never and end to these issues and someone is always looking to use them for publicity and political or financial gain.