I can understand their positions, and whn you look at the Indian's logo, I'd be offended, too.
The Redskins logo has always looked distinguished, to me, but yeah, the name is a clear no-no.
Chiefs and Braves seem kind of neutral, but I can see how their names are being used to instill thoughts of brave warriors in battle, and that's a stereotype they feel has been overused for long enough.
My guess is, with all that is going on now, these names will be changed within a year or two.
Hell, the Lincoln Memorial may be next, after all, he did sign off on the biggest gov't sanctioned lynching of Native Americans in US history.
https://www.history.com/this-day-in-history/300-santee-sioux-sentenced-to-hang-in-minnesota