What do you mean all of a sudden? The movement to eliminate Native American mascots has been an agenda item for the largest and most moderate American Indian organization since its inception. There wasn't a legal pathway to challenge the name Redskins as an offensive term until the Civil Rights Act was past. Notice there has not been a new mascot or team name/emblem adopted since that law was passed. The narrative that the majority of Indians aren't offended, and they are just now starting to complain about it is just bot correct.