Romik, I'm not certain your meaning of the above sentence. appalling = : inspiring horror, dismay, or disgust. Does this mean you are saying it is disgusting the changes that have taken place in such a short amount of time and that the "old" way of thinking about diversity is better?
Actually, the United States Census, (where the 72.4% number came from) requests that you list your race and break out Whites and Hispanics. Almost all demographic forms now have one question asking if you are white and a second question asking if you are of Latino or Hispanic descent. They also separate Asians, Native Americans, Native Alaskans, Native Hawaiians.
Take a look at the 2010 Census information scroll down about half way and there is an interact map with data by the entire US and by state and within the states by county.