It's Diversity, Stupid!

Thomas Sowell on why the Iraq War is so hard:

What is it that has made Iraq so hard to pacify, even after a swift and decisive military victory? In one word: diversity.
That word has become a sacred mantra, endlessly repeated for years on end, without a speck of evidence being asked for or given to verify the wonderful benefits it is assumed to produce.
Worse yet, Iraq is only the latest in a long series of catastrophes growing out of diversity. These include "ethnic cleansing" in the Balkans, genocide in Rwanda and the Sudan, the million lives destroyed in intercommunal violence when India became independent in 1947 and the even larger number of Armenians slaughtered by Turks during World War I.
Despite much gushing about how we should "celebrate diversity," America's great achievement has not been in having diversity but in taming its dangers that have run amok in many other countries. Americans have by no means escaped diversity's oppressions and violence, but we have reined them in.

There's an old saying "try to please everyone and you please no one".