He could have brought up his concerns to hiring authorities in the company, whose job it is to refute diversity myths. Not expect people who have had this burden placed on them for their entire adult life to do it yet again.
Also, please don't use quotation marks to make it look like you're quoting someone when you're not.
Imagine..."She thought black people should not have to sit at the back of the bus. She told authorities who just remained silent. She should have sucked it up and moved to the north!"