One of the peculiarities of the literature on "WMD terrorism" is the disparity between the large amount of attention paid to terrorist capabilities and the relatively small amount of attention paid to terrorist motivations.
Bale, Jeffrey. 2008. "Jihadist Ideology and Strategy and the Possible Employment of 'Weapons of Mass Destruction." In Jihadists and Weapons of Mass Destruction: A Growing Threat?. New York, NY: Routledge, 3-59.