It's stated in the very first paragraph of the piece.
John Derbyshire has set off a mini firestorm by responding to an article which details advice that black parents give their kids about coping with "White America", by giving advice to his own kids about coping with black America. And imagine White America's collective shock... he has been denounced for it as being racist. (actually I think it's ... "RACIST!!!")
Please see post #23 about the coffee, but add: yes, you are correct and I did NOT read the article thoroughly. MY bad.