Why do you think people that play in the NBA are stupid? People have opinions on social issues. Including celebrities. They aren't mindless drones. You'll be ok.
If they weren't "celebrities", nobody would give them a listen of any kind.
They just need to shut up and play.
As for the NBA, they have a huge number of athletes that did not finish their education and most of those couldn't pass and 8th grade aptitude test.
They're making it off their god given talent. They just need to enjoy the benefits that provides and shut up and play.