"In a 2007 online forum, al-Qa'ida's second in command Ayman al-Zawahiri, confronted questions about the organization's use of violence and especially violence against Muslims. Zawahiri and other leaders have defended al-Qa'ida's use of violence, arguing that their operations do not kill Muslims, and on the rare occasions they do, such individuals are apostates or martyrs. Since the inception of al-Qa'ida, the organization has claimed to represent Muslim interests around the world declaring itself the vanguard of true Islam, and the defender of Muslim people. Unfortunately for al-Qa'ida, their actions speak louder than their words. The fact is that the vast majority of al-Qa'ida's victims are Muslims: the analysis here shows that only 15% of the fatalities resulting from al-Qa'ida attacks between 2004 and 2008 were Westerners."
United States Military Academy. Combating Terrorism Center: http://www.ctc.usma.edu