why has new york preserved its white prole areas

[Bismarck]

The white “prole” areas in New York often have above average incomes and at least average rates of college education. Part of it is that New York whites often had ethnic identities that created an incentive to stick together. Most LA whites (aside from the large Jewish community) were old stock assimilated  British and German Protestants who could’ve found likeminded people elsewhere.