Who will stop them?

The slaughter of the Shiite majority by the Sunni minority in Iraq had been going on long before the US-led invasion. During Saddam Hussein's Sunni-minority rule, Shiites were systematically brutalised. It may be recalled that when after the First Gulf War in 1991, the Shiite majority rose in revolt against Saddam's brutal rule, his largely Sunni Republican Guards massacred them without mercy. Although the Sunni minority have lost their grip on power after the American invasion of 2003, the Sunni insurgents are systematically killing the Shiites in the name of fighting the coalition forces. For the Sunni extremists, the Shiites are heretics and must be destroyed. The Shiites are now retaliating by killing, albeit in much smaller numbers, Sunnis.

Who will stop the Sunni extremists from butchering their fellow Shiite Muslims in Iraq and Pakistan?