I think Kyrie is full of you know what, and I wish people would stop giving him opportunities to spin whatever narrative he's spinning at the current moment.
All of that said, I do think it's true that Boston is associated with Whiteness, both among players and in the popular consciousness / pop culture. I think that's a problem for the Celtics.
The Celtics ought to do whatever they can to promote and celebrate the communities in the Boston area that have a majority of residents of color, e.g. Roxbury, Dorchester, etc. The Celtics can and should do what they can to highlight the fact that Boston is not just a bunch of white people who love Tom Brady.