Why is it racist to have a white affinity club at school?

Because the literary magazine club, which is entirely white, is a white affinity club.
Because the GSA, which is entirely white, is a white affinity club.
Because many other clubs at this school are exactly like these two.
Because many churches, schools, workplaces, and government offices are white affinity clubs.
Because many towns and suburbs are white affinity clubs.
Because every country club or golf course for miles around is a white affinity club.
Because our entire society is one ginormous white affinity club.

We don't need another one.