I think there are a lot of factors to this kind of behavior (not defending it, no way, just explaining it). Some of it is simply because there has been so much immigration from Asia, especially China, and like other immigrant groups before them, that creates a reaction when there is ‘too many of them’. Like other immigrant groups, often these are based on perceptions of the group. Other places I have seen it is like other immigrant groups, the first generations tend to live in the same areas, and it isn’t just the city, there are towns on the coast of NJ in recent years (Palisades Park, Edgewater, Fort Lee) that have become heavily Asian (usually Korean or Chinese,Koreans a bit more than Chinese), and some people resent them “taking over”.
Some of it, too, is the same thing that dogged Jews, for different reasons. For Jews, it was the old garbage that Jews were not really citizens of where they lived , only stuck to themselves, etc, with Chinese I think some of it is looking at the Chinese government and assuming that somehow Chinese immigrants are loyal to China rather than the US, that they are more supportive of China than here, etc (in the current political climate, wouldn’t be surprised if it has gotten worse).
There is also some resentment because Asians, especially Chinese, are held up as this model minority (again, not unlike the Jews back in the day), and when you hear about Asians it is the image of the kids who are blowing out test scores, who are successful, and people see that and feel like they are being told somehow that Asians are so smart, so great, with the implication they are garbage or inferior, and some believe the Asians themselves promote this (not unlike again garbage once thrown at Jews in this country). Like with other groups, they don’t see the broad swath of things or the reality of what/who Asians are (people).
Chinese tourists may not help much, there are a lot of them, and they have a reputation which may not entirely be a stereotype, I just read something about how in China they are ‘tourist shaming’ people travlling for boorish behavior, this is especially true when the young “little emperors and empresses” travel to the US, they kind of act like they are Paris Hilton or someone like that in the tabloids from what I have seen.
Personally, I don’t think this is going to last, I think as time goes on things will normalize, eventually the Chinese will become like other groups and the suspicion will end, among other things once a group gets beyond a certain size and are present in more places, things change, plus it is a truth that the recent immigrants and their kids take the brunt of being different, once you get down the line it changes IME.
