Here is an article about it and the "evidence" that she was dragged around Twitter and that her suicide was caused by SJWs.

https://michaelhobbes.substack.com/p/dave-chappelles-some-of-my-best-friends

There is no evidence.

Of course it is upsetting.

Tokenism: the practice of making only a perfunctory or symbolic effort to do a particular thing, especially by recruiting a small number of people from underrepresented groups in order to give the appearance of sexual or racial equality.