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Popular opinion expresses fear that accessing radical Islamic content and connecting with extremist networks through Internet functionalities causes radicalization and recruitment to commit terrorist acts. Anecdotal evidence has been used to support this assertion. The opinion assumes the Internet creates a new path that drives radicalization and recruitment. Whether computer-mediated communication (CMC) and Internet functionalities cause individuals to radicalize has not been thoroughly studied. This thesis explores whether a correlation can be found to attribute radicalization to radicalizing content and extremist networks accessed through CMC and Internet functionalities. A framework is used to evaluate vulnerabilities identified by the psychological, sociological and social-psychological elements of radicalization against the radicalization process, personal history, and the presence of radicalizing conventional communication and extremist contact. The analysis finds three cases that may support a conclusion that Internet radicalization is possible; however, the importance of root causes and individual vulnerabilities may have a greater impact. Since some circumstances involving CMC may increase the likelihood of radicalization, the fear of Internet radicalization may be reasonable, but the number of incidents validating that fear makes the threat unlikely and appears more like a phantom menace than a real threat.

This work examines the intersections of subcultural theories and radicalization theories from terrorism studies to identify how they may be improved through integration. To date there have been almost no efforts to merge these frameworks, though terrorism shares common characteristics of deviant subcultures. Both are driven by ideologies that are in opposition to that of their targets. We focus particularly on the process of online radicalization to assess how subcultural research in online environments may inform the process of enculturation into a terrorist belief system. We conclude by discussing the implications of this expansion for research on terrorism and subcultures.

Anecdotal evidence asserts that extremist materials on the internet play a decisive role in radicalization processes. However, due to a structural absence of empirical data in the current literature, it remains uncertain if—and to what extent—online extremist materials radicalize. Therefore, the approach of the study was two-fold. First, we explored what types of online jihadist media are pro-actively sought and consumed by young adults. Second, we investigated if and how active exposure to online jihadist media is related to cognitive radicalization, whilst taking into account one’s moral disengagement, prior involvement in petty crime, and socio-demographics. Cross-sectional data analyses within a sample of Belgian young adults (n = 1872) show that beheading videos—the most violent and radical form of any of the jihadist materials under scrutiny—were most sought online (36%), but were, paradoxically, the least predictive for radicalization. On the contrary, the rather static jihadist magazines were sought by a small minority (10–11%) but were most strongly associated with radicalization. A stepwise linear regression analysis and Structural Equation Model support our hypothesis that the process of cognitive radicalization is a complex, phasic trajectory from actively seeking out extremist materials to sympathies for violent political behaviors.

This chapter explores the effects of the trust problem on jihadi internet discussion forums. The scarcity of non-verbal cues in digital communication facilitates deceptive mimicry, which undermines the inter- personal trust required for sensitive transactions. Open-source data from Arabic-language jihadi forums between 2006 and 2011 indicate that distrust there was high and direct recruitment rare. General trust also declined over time as policing of the forums increased. As of 2014, forums are still in use, but primarily for low-stake activities such as propaganda-sharing and ideological debate, not recruiting or operational coordination. Confidence in the authenticity of propaganda remained relatively high, due to vetting institutions and hard-to-fake video formats. A modicum of interpersonal trust also remained, thanks to reputation systems and a few relatively reliable signs of trustworthiness involving time expenditure. The trust problem is an Achilles heel for high-risk activists online, including pro-democracy activists in authoritarian settings.