Well, maybe they behave like that when they are in a group, but individuallly they may not be ethnocentric. They hate America while they admire the American advancement.
>>As many as 6 or 7 friends or even mere countrymen would end up colluding together against the western barbarian.
It's the bad part of the Chinese culture. They tend to believe in power and you were in the weak side. That explains why China needs a strong, powerful leader.
>>OF COURSE Chinese would aid one another against the westerner.
I don't think so. If the westner is powerful enough, they might aid him. The Chinese people is not a people of unity. They have been fighting among themselves for 5,000 years. Of course aiding foreigners is not popular in China because you are taking the risk of being called "traitor". When it goes to the nationalistic sentiment, no rationale works.
>>But this compulsion to help one another against the foreigner is SOOOOOOOOOOOOOOOOOO INTENSE AND SEEMINGLY GENETIC.
Because of the history.
>>I think the youth in the Mainland who are somewhat cheekily hostile to the U.S. do it as a kind of ethnocentric pride mixed with rebellion against the world authority of the U.S.
Also because they don't know the US. They don't know the hardship of the cultural revolution and they take the American culture they enjoyed for granted.
Where are you? Have you spent time in China? Are you Chinese?