Comment: This is absolutely true. Ethnic Chinese are among the most racist groups there are, and builders of highly insular communities. Social psychologists have recognized the in group/out group biases for years; evolutionary psychologists know the behaviour to a degree is in-born among human beings around the world. We prefer typically to be with like-minded and generally, like-behaving people. Most often, familiarity helps to overcome this basic "xenophobia", but not always. And of course, familiarity is difficult to achieve when one keeps away from "others".