Coalition officials and some analysts suspect that the aim of these attacks is to sow chaos and sectarian discord. Coalition officials point to an intercepted letter suspected to be from Abu Musab al-Zarqawi, in which he makes the case for attacking Shi'a in order to provoke an anti-Sunni backlash and thereby galvanize the Sunni population in support of the insurgents, as evidence. While hardcore Wahhabi "mujahideen" among the insurgency may indeed desire a sectarian civil war, other insurgents (both Sunni and Shia) charge that the coalition is attempting to instill a fear of civil war as part of a divide and conquer strategy.