Washington Blackskins.
Most players in the NFL are black, and most residents in Washington DC are black, so, who would be against Blackskins?
The only issue is with the first name, Washington. Washington is being excoriated presently, just like many other founding fathers. So, the team could simply be called: the DC Blackskins. If ‘black’ is offensive to anyone, then, simply name them “DC Skins”.
District Of the District-Formerly-Known-as-Columbia Felons.