I am not PRC

I read this article about a Sinkie complaining that a PRC waitress would speak to him in Mandarin for his orders. This is not the first time Sinkies felt offended when spoken to in Mandarin. Am I surprised? Is speaking to another Chinky, oops, I mean Sinkie Chink, in Mandarin an offensive thing? Isn’t Mandarin one of the four official languages of this country?

But I can understand why Sinkie