The truth is that people tend to gather when they are of the same economical range, not race. Immigrants will fall under specific social status group, therefore they gather with other immigrants since their economical range is the same or similar. This behavior is obvious in every city - rich neighborhoods, poor neighborhoods. Perhaps you should take some time to visit different cities...

The idea is to have poor activists in places that are usually with medium to high economies. See? An economical issue, not a race issue. Are the immigrants rich or poor? But I guess it's easier to segregate by the color of the skin, while quoting Aristotle...