Imo if you look a little deeper it's about him connecting with a community he's never felt a part of. He grew up in a white family in a well to do white suburb. His first exposure to black culture was in college and he saw he didn't fit in. So he joined an all black fraternity to the surprise of a lot of his teammates. His fraternity influenced a lot of his current beliefs and they have a history of activism. He felt different growing up as a person of color in an all white suburb, felt different in college not fitting in with his teammates, he just really wants to fit in somewhere. It's tough growing up an orphan feeling unwanted. Add to that feeling different your whole life being biracial and not fitting in with any one group. Makes you try harder to fit in. Or maybe he really just wants to change the world even though he has never been oppressed himself.