Schools usually punish the person who gets bullied while protecting the bully so of course they don't know how to handle this.

Why not? It’s just a moronic football game and maybe it’ll teach them consequences.

They might have been forced to forfeit the game for having too few players. There isn't a game to watch if nobody is playing.

Probably out of some sense of getting the rest of the school to learn a lesson, and creating anger at the racists. Probably misguided.

Because being teenagers is serious business.