There's a pattern that you see emerging in "late-stage" immigrants that are no longer found amongst other minorities in the United States. I believe that this pattern, where minorities share risk to bring about equal success and growth, stems completely from the racial divide that other minority groups in the US have had to fight against. An excellent example of this is immigrants who come to the US, ally with others of the same minority, share housing (even sometimes to the point of breaking the law), start businesses (while breaking several laws along the way), and then bring more immigrants in to help grow the business and then distribute that wealth to those involved. It's very similar to what happened in early European immigration to the US except that these "late stage" immigrants now know exactly what to avoid. They're able to take in all the advantages of being an immigrant while ignoring/offloading the risks associated with breaking the law. There's a reason that a stereotype exists regarding Vietnamese nail salons and, however inaccurate the stereotype may be, it started from this pattern of Vietnamese immigrants moving to the US, starting up nail salons, and bringing in hundreds more Vietnamese immigrants to grow these businesses while sheltering illegal practices that could be hidden by the growth of the business.

Minorities that are already in the United States don't have the ability nor the structure to make this a reality.