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In recent years, Hezbollah has used social media to recruit Israeli Arabs and West Bank-based Palestinians to attack Israeli targets. A recent innovation in terrorist tactics has given rise to “virtual entrepreneurs,” which to date have been largely associated with the Islamic State’s online recruitment efforts. Hezbollah’s virtual planners, similar to those in the Islamic State, use social media to establish contact with potential recruits before transitioning to more encrypted communications platforms, transferring funds, and issuing instructions to form cells, conduct surveillance, and carry out terrorist attacks. Online recruitment presents a low-cost option that offers plausible deniability for Hezbollah. While every virtual plot led by Hezbollah that targeted Israel has been foiled thus far, Israeli authorities spend time and resources disrupting these schemes at the expense of other more pressing threats. By digitally recruiting Palestinians to attack Israel, Hezbollah and its patron Iran are seeking to cultivate a new front against Israel amid rising regional hostilities.

Online behaviour can provide a unique window from which we can glean intent. From an intelligence standpoint it provides an important source of open-source information. However, making inference of intent from online activity is inherently difficult. Yet elsewhere progress is being made in incorporating information online into decisions regarding risk and offender prioritisation. This chapter synthesises lessons learnt from studies of risk assessment of violent extremists, risk assessment online, and the form and function of extremist materials online in order to begin to approach the issue of online risk assessment of violent extremism. In doing so it highlights issues associated with the diversity of online extremist behaviour, the diversity of offline extremist behaviour and the general lack of understanding related to the interaction of online and offline experiences, and how this contributes to the wider psychological process of ‘radicalisation’. Implications for practitioners are discussed.

Objective: This paper applies Reinforcement Sensitivity Theory to explain the role of exposure to violent extremist content online in the wider psychological process of “radicalization.” Reinforcement Sensitivity Theory is a suitable theory to apply to this domain given that (a) the motivation to engage in violent extremism is widely discussed, yet motivational theories are rarely applied and (b) current risk factors for engagement in violent extremist behavior show a high degree of overlap with core Reinforcement Sensitivity Theory variables (e.g., impulsivity and social dominance). Method: This study uses an experimental design in which 479 participants from Amazon’s Mechanical Turk were randomly assigned one of two short vignettes (violent extremist/violent nonextremist) to frame the content of a social media-based behavioral task. The effect of exposure to violent extremist content online on intentions for political mobilization was measured via the Activism and Radicalism Intentions Scale. Results: While exposure to online violent extremist content did not increase tendencies for political mobilization, Behavioral Activation System traits were positively associated with the willingness to engage with violent extremist content online and with intentions for political mobilization. Conclusions: Behavioral Activation System traits provide a possible avenue to explain individual differences in the process of radicalization and the potential relevance of Reinforcement Sensitivity Theory for theories of radicalization provides further evidence that new knowledge that can be gleaned by applying established psychological theories to the study of radicalization.

In this study, and with a view to extending upon existing findings on the effects of general violent media on violent cognitions, we experimentally measured the relationship between exposure to extremist propaganda and violent cognitions. Our results countered our hypotheses and the wider findings of violent media and aggression that exposure to violent stimuli increases violent thoughts and that this effect is moderated by trait aggression. Specifically, this study found that participants with low and medium trait aggression became more pro-social after being exposed to extremist propaganda. We discuss these results with reference to theories of terror management and mortality salience, as well as the implications of these results for wider theories of the role of online extremist material in the wider “radicalization” process.

The development of the Internet and social media has exploded in the last couple of years. Digital environments such as social media and discussion forums provide an effective method of communication and are used by various groups in our societies.  For example, violent extremist groups use social media platforms for recruiting, training, and communicating with their followers, supporters, and donors. Analyzing social media is an important task for law enforcement agencies in order to detect activity and individuals that might pose a threat towards the security of the society.

In this thesis, a set of different technologies that can be used to analyze digital environments from a security perspective are presented. Due to the nature of the problems that are studied, the research is interdisciplinary, and knowledge from terrorism research, psychology, and computer science are required. The research is divided into three different themes. Each theme summarizes the research that has been done in a specific area. The first theme focuses on analyzing digital environments and phenomena. The theme consists of three different studies. The first study is about the possibilities to detect propaganda from the Islamic State on Twitter.  The second study focuses on identifying references to a narrative containing xenophobic and conspiratorial stereotypes in alternative immigration critic media. In the third study, we have defined a set of linguistic features that we view as markers of a radicalization.

This article is concerned with the distinction between acceptable race talk in social media and organised, extreme or ‘frozen’ racism which is considered hate speech and removed. While in the literature this distinction is used to point to different variants, styles and mutations of racism, in social media platforms and in European regulatory frameworks it becomes policy. The empirical part of the article considers this distinction drawing upon a series of posts following a stabbing incident in a small Irish town, which organised Twitter accounts sought to connect to terrorism. The empirical analysis examines the tweets of those accounts and the comments left on the Facebook page and website of one of the main Irish online news outlets. The analysis shows few if any differences between the two, concluding that there is a blending of supremacist and everyday, ambient racist discourses. This blending indicates the operation of a transnational contagion, given the shared vocabularies and discourses. It further problematises the distinction between ‘illegal hate speech’ and ‘acceptable race talk’, and throws into question the principle underlying both the policies of social media as well as the European efforts to de-toxify the digital public sphere.