Stop being so f***ing sensitive wont you?
That is what satire is, a literary composition, in verse or prose, in which human folly and vice are held up to scorn, derision, or ridicule.
By using this particular and common expression, he is actually saying a whole lot more about black South africans (BEE beneficiaries in particular) than Chinese, despite the use of the word chink. I doubt the Chinese have a problem with it, cos it is making thier point quite clear.
a chink in someone's armour (British & Australian, American & Australian)
if someone or something which seems to be strong has a chink in their armour, they have a small fault which may cause them problems, eg. She's a brilliant businesswoman, but her lack of political awareness may be the chink in her armour.