I suspect there would also be Chinese in the West who hate China and talk up the UK, USA, Australia, wherever.

I'm going to have to disagree with you on this one Silverboy. There are plenty of Chinese immigrants who love talking about how great China is once they get to the west, but they will never go back to where they were from. As for the West, these folks have plenty of bad things to say. But no matter how much they may "hate" the West, they will always stay there. The issue of ethics isn't really something to think about in a general sense.