So after the grotesquerie of the Taliban and Osama bin Laden and 15 of the 19 suicide killers of 9/11, meet Saudi Arabia's latest monstrous contribution to world history: the Islamist Sunni caliphate of Iraq and the Levant, conquerors of Mosul and Tikrit – and Raqqa in Syria – and possibly Baghdad, and the ultimate humiliators of Bush and Obama.