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Recent terrorist attacks carried out on behalf of ISIS on American and European soil by lone wolf attackers or sleeper cells remind us of the importance of understanding the dynamics of radicalization mediated by social media communication channels. In this paper, we shed light on the social media activity of a group of twenty-five thousand users whose association with ISIS online radical propaganda has been manually verified. By using a computational tool known as dynamical activity-connectivity maps, based on network and temporal activity patterns, we investigate the dynamics of social influence within ISIS supporters. We finally quantify the effectiveness of ISIS propaganda by determining the adoption of extremist content in the general population and draw a parallel between radical propaganda and epidemics spreading, highlighting that information broadcasters and influential ISIS supporters generate highly-infectious cascades of information contagion. Our findings will help generate effective countermeasures to combat the group and other forms of online extremism.

As violent extremists continue to surface in online discussion forums, law enforcement agencies search for new ways of uncovering their digital indicators. Researchers have both described and hypothesized a number of ways to detect online traces of potential extremists, yet this area of inquiry remains in its infancy. This study proposes a new search method that, through the analysis of sentiment, identifies the most radical users within online forums. Although this method is applicable to web-forums of any type, the method was evaluated on four Islamic forums containing approximately 1 million posts of its 26,000 unique users. Several characteristics of each user’s postings were examined, including their posting behavior and the content of their posts. The content was analyzed using Parts-Of-Speech tagging, sentiment analysis, and a novel algorithm called ‘Sentiment-based Identification of Radical Authors’, which accounts for a user’s percentile score for average sentiment score, volume of negative posts, severity of negative posts, and duration of negative posts. The results suggest that there is no simple typology that best describes radical users online; however, the method is flexible enough to evaluate several properties of a user’s online activity that can identify radical users on the forums.

Analyses of extremist video messages typically focus on their discursive content. Using the case of ISIL (Islamic State of Iraq and the Levant), this study instead draws upon the emerging subfield of genosonic analysis to understand the allure of extremist videos, as well as the ineffectiveness of US video messages designed to ‘counter violent extremism’ (CVE). Through a genosonic analysis of three high-profile ISIL videos and five popular US State Department CVE videos, the study advances two concepts – sonorous communality and sonic unmaking – to help explain ISIL’s appeal. The lack of equivalent dimensions in US CVE videos renders them sonically sterile in comparison to those of ISIL. The implications of this analysis for scholarship and practice conducted at the intersection of media, war and conflict are discussed.

Adam Gadahn’s Abbottabad letter offers a rare opportunity to examine how this Al Qaeda Senior Leadership (AQSL) media operative and spokesman conceptualizes and executes media warfare. In this article, I first introduce, depict, and employ the author’s Terrorist Quadrangle Analysis (TQA) as a useful heuristic for conceptualizing and representing the four interrelated components of the AQSL terrorist enterprise: political objectives, media warfare, terrorist attacks, and strategic objectives. This TQA construct is then employed to conceptualize Gadahn’s media warfare acumen. Gadahn is shown to be an adept communications warfare operative who conscientiously disaggregates and evaluates key target audiences, messengers, messaging, and media. Gadahn’s vehement critique of select ‘‘jihadi’’ groups, in particular Tehrik-i-Taliban (TTP), al-Shabaab, and the Islamic State of Iraq (ISI), is then described. Key here is how and why Gadahn denounces their indiscriminate, murderous terrorist attacks on Muslim non-combatant civilians and other protected persons as effectively subverting his intended AQSL media warfare strategy and undermining AQSL strategic and religio-political objectives. A concluding section briefly summarizes these chief findings, offers select implications for scholarship and counter-AQSL messaging strategy, and identifies study limitations.

The current crises in Syria has led to a number of Britons travelling abroad to fight with groups such as Isis. Capitalising on this growth, Isis are now increasingly fighting an online cyber war, with the use of slick videos, online messages of hate and even an app that all aim to radicalise and create a new generation of cyber jihadists. These modern day tools are helping Isis spread their propaganda and ideology to thousands of online sympathisers across the world. Indeed, the group has actively been using social media sites such as Twitter, Facebook and YouTube to recruit new would be members. This is being done through images and the streaming of violent online viral videos filmed and professionally edited that are targeting young and impressionable people. Portraying a glamorised and ‘cool’ image, Isis fighters are beginning to act as the new rock stars of global cyber jihad. The Internet therefore is becoming the virtual playground for extremist views to be reinforced and act as an echo chamber. This study analysed 100 different Facebook pages and 50 Twitter user accounts which generated over 2050 results and helped the author create a typology of seven key behaviour characteristics and motivations. The findings in this study confirmed the author’s original hypothesis, i.e. online hate is being used by groups such as Isis for a variety of reasons such as recruitment and propaganda. Moreover, this material is coordinated and controlled by Isis as a means for publishing and sending out key messages.

The odds in stumbling over extremist material in the internet are high. Counter speech videos, such as those of the German campaign Begriffswelten Islam (Concepts of Islam; Bundeszentrale für politische Bildung, 2015a) published on YouTube, offer alternative perspectives and democratic ideas to counteract extremist content. YouTube users may discuss these videos in the comment sections below the video. Yet, it remains open which topics these users bring up in their comments. Moreover, it is unknown how far user comments in this context may promote hate speech—the very opposite of what counter speeches intent to evoke. By applying a qualitative content analysis on a randomly selected sample of user comments, which appeared beneath the counter speech videos of Concepts of Islam, we found that comments dominated, which dealt with devaluating prejudices and stereotypes towards Muslims and/or Islam. However, we also discovered that users in a large scale discussed the content of the videos. Moreover, we identified user comments, which hint at hateful speech either in comments themselves or the discourse the comments are embedded in. Based on these results, we discuss implications for researchers, practitioners and security agencies.