I suspect these schools were the only way for white and Asian parents to safely put their children in public schools; if they fill them with those under-represented populations (under-represented because their cultures place little value on education) then many of those original parents probably have to leave NYC.
The new changes are actually a racist policy which asserts that minority students are not capable of doing the work others do;
that they can never succeed without being given a crutch;
and that perpetuates the above stereotypes.
Everyone (including minorities) should reject it.