because traditional minorities, ie - slave descended blacks and native americans, make up a smaller portion of the population today than they did in 1960. But the explosive growth in the non-traditional minorities MORE than makes up for the decline. Add in the fact that many of the new arrivals speak english only as a second language... and you would think some degree of mistrust would not be a surprise considering our history.
The Extraordinary 30-Year Growth of the U.S. Hispanic Population http://www.theatlanticcities.com/neighborhoods/2013/08/extra...
US ethnic minorities make up 49.9 per cent of under-fives http://www.telegraph.co.uk/news/worldnews/northamerica/usa/1...