The Power of Unreason is a new report from the UK-based political think tank, Demos, that examines the role of conspiracy theories in the motivation of extremist groups. It seems to confirm the virulent (and viral) nature of conspiracy theories and their use to recruit and strengthen extremist groups. Interesting reading. Some highlights:

Much Weirdness In Common

Our analysis shows that conspiracy theories are widely prevalent across this extremist spectrum, despite the vast differences in the extremist ideologies themselves.