Certainly not as many as Communism or Nazism, but in the various manifestations of political Islam (aka Islamism), I think it's fair to say its adherents have killed millions.
In toting up that grim number I'd include the following, in which political Islam of one stripe or another was certainly a motivating force:
1. The Bangladesh Massacre, targeted disproportionately at Hindus. More than 3 million dead.
2. The Iran/Iraq War. Iraq started it but Saddam's avowed intention, to the extent it can be trusted, was to stop Khomeini from fomenting Islamic revolution in Iraq. Massive atrocities on both sides, 1.3 million dead.
3. The Algerian Civil War. 150-200 thousand dead.
4. The Janjaweed perpetrators of the Sudanese Genocide. At least 330 thousand dead.
The killers/combatants here were influenced by numerous factors, but even if you assign only fractional "credit", I think it is indeed accurate to ascribe millions of deaths to political Islam. Moreover (and this is I think the point you were driving at), I think it's fair to say that Al-Qaeda has genocidal intent even if not capabilities.
http://en.wikipedia.org/wiki/Islamism#Specific_examples
In toting up that grim number I'd include the following, in which political Islam of one stripe or another was certainly a motivating force:
1. The Bangladesh Massacre, targeted disproportionately at Hindus. More than 3 million dead.
2. The Iran/Iraq War. Iraq started it but Saddam's avowed intention, to the extent it can be trusted, was to stop Khomeini from fomenting Islamic revolution in Iraq. Massive atrocities on both sides, 1.3 million dead.
3. The Algerian Civil War. 150-200 thousand dead.
4. The Janjaweed perpetrators of the Sudanese Genocide. At least 330 thousand dead.
The killers/combatants here were influenced by numerous factors, but even if you assign only fractional "credit", I think it is indeed accurate to ascribe millions of deaths to political Islam. Moreover (and this is I think the point you were driving at), I think it's fair to say that Al-Qaeda has genocidal intent even if not capabilities.