It's not because the buyers are Chinese it's mostly due to the volume of purchases affecting the market so directly. They could be "Newfies" if you had as many driving up prices so dramatically, you'd get an outcry. It happens in the US in Portland you'll occasionally see signs about No Californians.

It doesn't help that many of those are not "regular" Chinese but people with money and connected, the Chinese .1%ers, so to speak, who are buying properties as a pied de terre in the event things go bad in the homeland and they need to hightail it as well as a place to park their connected money.