Chinese are everywhere

So I've noticed that overseas Chinese turn out in overwhelming support of the country they fled so they could have a better life.  Regardless of issue, these Chinese talk like they're still Chinese nationals with little regard to where they actually live, in the US, Canada, Australia, Germany, etc

Cities like San Francisco are nearly at 30% Chinese population, how did this happen? 

I'm not against immigration, but seeing that they don't want to assimilate and protest against OUR policies on OUR soil, is it time to stop immigration from China?
 

I'm Chinese American (read: raised in the US) although I'm fluent in Chinese.

At school, I met some international students from China and because I can speak the language, they assume I'm one of them.  Then over time, they're shocked to realize that I like American rock/pop music, I usually eat American food, I dislike Karaoke, I like Anime (read: most Mainland Chinese have a thing against Japanese culture). The "wtf is wrong with you" look given to me afterwards is priceless.

From my experience, many Chinese immigrants harbor the same degree of arrogance in refusing to assimilate as the amount of arrogance projected by the Americans who mock them with racist comments.  Refusing to assimilate or even acknowledging American culture can be seen by Americans as disrespect, and in turn, they won't respect Chinese people (not saying both sides do this intentionally and consciously.)  I feel that by making an effort to at least partially assimilate, the American public's perception of Chinese will improve (although it may take years to see the changes.)