Racism in auto manufacturing seems to be as rampant as sexual harassment and discrimination in tech. Without even trying that hard:
Ford: https://www.hometownstations.com/news/ford-employees-say-rac...
GM: https://www.cnn.com/2019/01/16/us/gm-toledo-racism-lawsuit/i...
Toyota: https://auto.hindustantimes.com/auto/news/toyota-says-it-no-...
Honda: https://www.courthousenews.com/honda-plant-accused-of-tolera...
That being said, this isn't the first time in the last few years there's been a suit against Tesla. Either this isn't been a focus for management, or their remediation has been deficient in preventing this sort of toxicity from flaring up out in the open.