They all get along.
They're competitive, don't get me wrong—ultra competitive people who have always been among the best at everything, and want to win more than anything.
But they're also friends. They grew up playing against the guys who went to the other schools. If they're Polynesian, there definitely related to people on the other teams (or their coaching staffs). They go to the same parties, attend each other's weddings, and are in group chats with each other.
They're friends. And—even though they want to win more than the fans—they take the rivalry way less seriously than the fans