Interesting. My view: I thought it unlikely that Harrisburg had an all non black team and yes, they had black players. So a non black Harrisburg kid was using the N word towards the opponents and his teammates (black or white or yellow or red) had nothing to say? Not likely. Not likely when I was kid either.
Then the Seton coach failed to teach a valuable lesson in walking off the court. That is, you control only your actions not the other team. Leadership man, be a leader.