They are free to form whatever group they want. I just find it highly ironic that they form a "diversity club". And it's made up of entirely of one particular group. That tells me it isn't about inclusion but social engineering.
It's not unlike the concept of being a nonconformist . . . by conforming to a different standard. Kind of like those goth kids. Wow, they're really individuals who don't let society tell them how to act or what to wear. Of course, they let their virtually carbon-copy clique members dictate every aspect of their lives. Nonconformity by conforming! Woo-hoo!
We could look at the current version of "diversity" are progress. "Diversity" used to be a code word for "we need more black people," and now it means "everyone but white people." That's progress, isn't it?