Is Goal of Diversity To Keep Population Divided and Weak?

Former Harvard U. Professor of Government James Q. Wilson:"most ethnic groups, when reasonably free to choose a place to live, have chosen to live among people similar to themselves." (p. 39, Thinking About Crime) Contrary to the goals of diversity? When groups of people associate with people like themselves they accumulate power as a group. Is diversity an elitist program to weaken the population of the United States, and to keep them divided and weak?

http://www.thecrimson.com/article/2013/11/5/norm-jones-diversity-officer/

Jones Begins Tenure as Harvard's First Associate Chief Diversity Officer
By CALLIE H. GILBERT, CONTRIBUTING WRITER
Harvard Crimson
November 5, 2013