Divided We Fall
 
One of the left's oft-repeated mantras is "Diversity is our strength."  But diversity by itself has never historically been a strength unless those diverse people were united around something -- usually a set of common values. 
 
Our Founding Fathers recognized this when they adopted the phrase "E Pluribus Unum" -- Out of many, one.  What is the "one"?  It's the idea of being American, believing in freedom and the common values of Judeo-Christian civilization.