Celtics no less ..
Celts get some unnecessary grief because they were the "white" team in the '80s. It was ironic, because they were the first team to draft an African-American, first team to start 5 African-Americans, first team (since the early NFL) of the major sports to have an African-American coach (Russell) and, of course, first African-American coach to win an NBA title. KC was also the coach of those 80s teams. Red and Walter Brown were not bigots.
The Celts really were never the popular winter team up in some parts of the city through the 70s perhaps because they were too integrated. When they made a TV movie out of Common Ground, a great book on desegregation in the 70s, they did a scene that was supposed to be a neighborhood meeting in Charlestown, a historically Irish neighborhood before gentrification that was strongly opposed to the busing order. They wanted to make a guy in the crowd look like a bigot, so they put him in a Celtics jacket, which was pure artistic license. You would never find a Celts jacket in Charlestown at that time. Townies followed the Bruins, not the Celts. Howie Long sometimes talks about those times. His folks pulled him out of public school to avoid busing.