If you had your fill with the Kurds and the Sunnis and the Shiites of Iraq, welcome to the warring histories of the Pashtuns, the Uzbeks, the Tajiks, and the Hazara Shiites of Afghanistan.In their disdain for that Iraq project, the Democrats and the liberal left had insisted that Iraq was an artificial state put together by colonial fiat, and that it was a fool's errand to try to make it whole and