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Social networks are being used by terrorist organizations to distribute messages with the intention of influencing people and recruiting new members. The research presented in this paper focuses on the analysis of Twitter messages to detect the leaders orchestrating terrorist networks and their followers. A big data architecture is proposed to analyze messages in real time in order to classify users according to diferent parameters like level of activity, the ability to infuence other users, and the contents of their messages. Graphs have been used to analyze how the messages propagate through the network, and this involves a study of the followers based on retweets and general impact on other users. Ten, fuzzy clustering techniques were used to classify users in profiles, with the advantage over other classifcations techniques of providing a probability for each profile instead of a binary categorization. Algorithms were tested using public database from Kaggle and other Twitter extraction techniques. The resulting profiles detected automatically by the system were manually analyzed, and the parameters that describe each profile correspond to the type of information that any expert may expect. Future applications are not limited to detecting terrorist activism. Human resources departments can apply the power of profle identification to automatically classify candidates, security teams can detect undesirable clients in the financial or insurance sectors, and immigration officers can extract additional insights with these
techniques.

We analyze 26.2 million comments published in Arabic language on Twitter, from July 2014 to January 2015, when Islamic State of Iraq and Syria (ISIS)’s strength reached its peak and the group was prominently expanding the territorial area under its control. By doing that, we are able to measure the share of support and aversion toward the Islamic State within the online Arab communities. We then investigate two specific topics. First, by exploiting the time granularity of the tweets, we link the opinions with daily events to understand the main determinants of the changing trend in support toward ISIS. Second, by taking advantage of the geographical locations of tweets, we explore the relationship between online opinions across countries and the number of foreign fighters joining ISIS.

Since the declaration of the War on Terror in 2001, militant groups such as al-Qaeda and the Islamic State have used the internet to disseminate their message and persuade people to commit violence. While many books have studied their operational strategies and battlefield tactics, Media Persuasion in the Islamic State is the first to analyze the culture and psychology of militant persuasion.

Drawing upon decades of research in cultural psychiatry, cultural psychology, and psychiatric anthropology, Neil Krishan Aggarwal investigates how the Islamic State has convinced people to engage in violence since its founding in 2003. Through analysis of hundreds of articles, speeches, videos, songs, and bureaucratic documents in English and Arabic, the book traces how the jihadist Abu Musab al-Zarqawi created a new culture and psychology, one that would pit Sunni Muslims against all others after the U.S.-led invasion of Iraq. Aggarwal tracks how Osama bin Laden and al-Zarqawi disagreed over the goal of militancy in jihad before reaching a détente in 2004 and how al-Qaeda in Iraq merged with five other groups to diffuse its militant cultural identity in 2006 before taking advantage of the Syrian civil war to emerge as the Islamic State. Aggarwal offers a definitive analysis of how culture is created, debated, and disseminated within militant organizations like the Islamic State. Psychiatrists, psychologists, and area-studies experts will find a comprehensive, systematic method for analyzing culture and psychology so they can partner with political scientists, policy makers, and counterterrorism experts in crafting counter-messaging strategies against militants.

This article maps mechanisms by which online social media activities may contribute to right-wing political violence. High-impact studies on the wave of right-wing and racist violence in the 1990s and early 2000s established that mass media discourse on immigrants and previous violent incidents had a significant influence on the prevalence of radical right violence. This link was captured by Koopmans’s and Olzak’s notion of discursive opportunities. However, this was before the dominance of online social networks and social media, which changed the media landscape radically. We argue for broadening and refining the operationalization of the concept of discursive opportunities in social movement studies as well as including in our theoretical models new mechanisms brought about by the new online media. In relation to radical right and anti-immigrant mobilizations in Sweden in the 2010s, we elaborate and exemplify three mechanisms through which activities on social media may affect the incidence of violence: a) having an increasingly co-produced discursive opportunity structure, b) making inter-group dynamics in movement groups and networks trans-local, and c) sharing (rare) practical information and co-ordinating activities.

Although video releases have been central to the Islamic State’s efforts to represent itself to its audiences, an extensive quantitative and qualitative study of these sources over a longer period of time is still lacking. This paper therefore provides an overview and analysis of the entire corpus of official videos released by the Islamic State between 1 July 2015 and 30 June 2018. It particularly focuses on how the Islamic State’s decline in Iraq and Syria during this period is reflected in its video output and how the group has responded to its setbacks. The paper demonstrates a strong correlation between the group’s mounting troubles and its video production: the numbers of videos decreased dramatically and their content reflects the Islamic State’s (re)transformation from a territory-based ‘state’ to an insurgent group relying on guerrilla tactics and terrorist attacks. Nevertheless, this paper argues that the Islamic State’s multi-faceted response to its setbacks might ensure the groups’ appeal to its target audience in the years to come.