Here's a warning flag from 2018. Variations on this story kept popping up many times over the years, but never got sustained national press attention.
Money quote which makes it clear why these problems persisted:
In other words, in a Musk-run company, as soon as an insincere apology is presented, the victims are obliged to shut up and go back to work. How much do you want to bet nobody ever got fired from Tesla for drawing a racist caricature and placing it where Black coworkers were guaranteed to see it?
Menial Tasks, Slurs and Swastikas: Many Black Workers at Tesla Say They Faced Racism (Published 2018)
African-American workers have reported threats, humiliation and barriers to promotion at the plant. The automaker says there is no pattern of bias.
www.nytimes.com
Money quote which makes it clear why these problems persisted:
In an email to employees last year, which the company later released in response to one of the lawsuits, Elon Musk, Tesla’s chief executive, warned against “being a huge jerk” to members of “a historically less represented group.” At the same time, he wrote, “if someone is a jerk to you, but sincerely apologizes, it is important to be thick-skinned and accept that apology.”
In other words, in a Musk-run company, as soon as an insincere apology is presented, the victims are obliged to shut up and go back to work. How much do you want to bet nobody ever got fired from Tesla for drawing a racist caricature and placing it where Black coworkers were guaranteed to see it?