As a white person, I'm so sorry to hear about your internalized racism. /s
In all seriousness though, this is an aspect I really detest about anything related to "diversity". It doesn't really seem like it's actually about helping anyone, but more an opportunity for white people to pat themselves on the back without really doing anything other than policing language. All the people I know who "care" about diversity only started caring when it became part of their job.
I've only ever seen the claims "non-whites can't be racist" and "racism is prejudice plus power" from the left, so I'm not sure what issue you're taking with him here. Sure, not every single leftist believes that tripe, but that belief is essentially exclusive to leftists. Not all mammals are dogs, but all dogs are mammals.
@BurningFrog, your comment itself smacks of bigotry, ironically. It seems to denigrate rather than enlighten and provide a solution. Also nowhere in the parent comment does it state that the HR employee themselves was not a POC (person of color).