And I say that as someone who spent the first EIGHT OR SO YEARS in my place of work having people address me in a 'joke' Caribbean accent and calling me Winston in the style of Jim Davidson, describing anyone vaguely dark as having 'a touch of the tar brush', saying things like 'absolutely terrifying, these black women' to me and on and on and on.
It was always supposed to be a joke. These people were friends and mentors and otherwise very nice to me, but it was impossible to believe they took me seriously as a colleague when this was how I was treated. They had no idea whatsoever of what it was like to be on the receiving end of this type of constant othering.
I finally cracked when someone called me a nig-nog at a work event. Apparently it was supposed to be affectionate, but my tantrum was epic. I haven't had a problem since. They've all forgotten they ever did it and frequently mention cases about this kind of thing in the news with shock and disapproval.
To all the people who say 'but it was only a joke' I say: many a true word is spoken in jest; and when the jokes are constant, denigrating, and one-sided (you don't get to respond in kind) they are a very real problem.