I understand that, and agree to some extent, and yet universities don't claim to give preference to East Asians or South Asians (actually they discriminate against these groups, but that is another matter). Usually universities would call Blacks and Hispanics "historically underrepresented groups" or something similar.
A good term to use is "margarine group", it's more accurate than minority. In apartheid south Africa black people were a margalized group despite being the majority of the people.
Likewise, one could say that a minority of the USA is Asian, but are Asians a margalized group when it comes to university?
