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Drawing from Life Course Theory (LCT) and General Strain Theory (GST), the current study sought to address the development of negative affect in the online context, specifically whether the turning point of entrance into adulthood was associated with a change in the sentiment expressed online. A mixed-methods approach was employed, whereby 96 individuals were sampled from 3 online Islamic forums, and approximately 3000 posts per user were analyzed over 9 years. Quantitative results display a development in sentiment over time (increasing in negativity) for both minors and adults. Qualitatively, most users displayed a change in overall posting content throughout their time online; but a select few did not display any development – these individuals were the most negative/extreme on the forum. Implications of these findings for research on the role of the Internet in the development of negative narratives and extremism are discussed, as well as avenues for future research.

This study identifies and compares the methods of recruitment used by three prime jihadist organizations through their online magazines. The successful recruitment efforts and growth as a threat by the Islamic State of Iraq and Shām (ISIS), Al-Qaeda, and Al-Shabaab are attributed, in part, to the widespread popularity and accessibility of Dabiq and Rumiyah (published by ISIS), Inspire (published by Al-Qaeda), and Gaidi Mtaani (published by Al-Shabaab). In order to best examine the techniques of persuasion and propaganda to recruit new followers, the theoretical approach of compliance-gaining theory and methodological approach of narrative analysis are applied. The author analyzed a total of twelve magazine issues to compare how the four magazines use (1) imagery, (2) attrition, (3) intimidation, (4) propaganda, (5) spoiling, (6) outbidding, (7) incitement, and (8) recruitment. To validate each of these themes, the study applies an open-coding instrument to select each label based on specific dimensions. These findings reveal how the same purpose to achieve the Caliphate can be chosen on a similar path by these three different jihadist organizations. This path may take different turns at certain spots, but ultimately the road is based on the same historical context to justify the recruitment process. Overall, this study provides fresh descriptive insights on jihadist organizations’ recruitment methods to gain new followers toward the achievement of the Caliphate (i.e., the global Islamic state). The sample reveals that the online jihadist magazines integrate all analyzed themes to portray their messages. The findings show certain issues implement specific themes more than others. Across the sample, the use of persuasion justified and encouraged violence. Persuasion is found in prideful examples of successful terrorist attacks and aftermath scenes of destruction. The distinct difference between the four online jihadist magazines is the persuasion of recruitment.

Through a descriptive and qualitative content analysis of Al-Qaeda videos from 2001 to 2010, this thesis describes how the organization‘s video production has undergone a surge in production quality by using modern technology and skilled recruits. This thesis also provides background on the Islamic culture and the history of Al-Qaeda in order to put into perspective the goals of the organization‘s framed messages that are incorporated into their videos. The study also draws on the parallels of propaganda used throughout history to highlight how regimes from all over the world understand the importance of communication during a time of war.

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.

Why do ordinary people become supportive of violent, extremist ideologies? Over the past several years, tens of thousands of individuals across the world have become attracted to propaganda disseminated by the Islamic State (ISIS), and many have left their home countries to join the organization. This dissertation closely examines possible explanations for pro-ISIS radicalization in Europe and the United States. I argue that anti-Muslim hostility is an important driver of pro-ISIS radicalization, leading individuals who feel isolated to become attracted to the organization’s propaganda. I also contend that groups like ISIS are aware of this pattern, and thus seek to purposefully provoke hostility against potential supporters by carrying out terrorist attacks. I maintain that efforts to stop radicalization should focus on ways to reduce hostility and increase the inclusion of minorities in the West. The various dissertation papers empirically examine different aspects of these arguments. In the first paper, I examine whether anti-Muslim hostility might be driving pro-ISIS radicalization in Europe, by analyzing the online activity of thousands of ISIS sympathizers in France, Germany, Belgium, and the United Kingdom. Matching online radicalization indicators with offline data on vote share for far-right, anti-Muslim parties, I show that the intensity of anti-Muslim hostility at the local (neighborhood/municipality) level strongly correlates with support for ISIS on Twitter. In addition, I show that events that stir anti-Muslim sentiments, such as terrorist attacks and anti-Muslim protests, lead ISIS sympathizers to significantly increase pro-ISIS rhetoric, especially in areas with high far-right support. In the second paper, I argue that armed groups strategically use terrorism to manipulate levels of anti-Muslim hostility in Western countries. I test whether terrorism leads to greater expressions of anti-Muslim hostility using data on thirty-six terrorist attacks perpetrated by radical jihadists in the West from 2010 to 2016, examining how they shaped anti-Muslim attitudes among individuals in targeted countries. I find that individuals systematically and significantly increase the posting of anti-Muslim content on social media after exposure to terrorism. The effect spikes immediately after attacks, decays over time, but remains significantly higher than pre-attack levels up to a month after the events. The results also reveal that the impact of terrorist attacks on anti-Muslim rhetoric is similar for individuals who already expressed hostility to Muslims before the attacks and those who did not. Finally, I observe that the impact of terrorist attacks on anti-Muslim hostility increases with attacks resulting in greater numbers of casualties.  In the third paper, I examine what might be done to stop online radicalization and support for ISIS in the West. I collected data on community engagement events performed in the United States by the Obama Administration, which aimed to increase trust and relationships between the Muslim population and the American government, and combined them with high-frequency, geo-located panel data on tens of thousands of individuals in America who follow Islamic State accounts on Twitter. By analyzing over 100 community engagement events in a Difference-in-Differences design, I find that community engagement activities are systematically and significantly associated with a reduction in pro-ISIS rhetoric on Twitter among individuals located in event areas. In addition, the observed negative relationship between community engagement activities and pro-ISIS rhetoric is stronger in areas that held a large number of these events.

This thesis argues that Hamas and the Islamic State, two non-state armed groups located in the Middle East, each carefully calibrate their own war-fighting activities with their communications approaches in order to achieve their respective political objectives. Drawing on scholarship focusing on non-state armed groups and political communication, as well as other secondary sources such as specialist journalism, the thesis critically analyses online communications material distributed by Hamas and the Islamic State through official and affiliated websites, digital publications, YouTube clips, tweets, and other social media platforms. While there is a striking degree of conformity between the sophisticated, comprehensive, and disciplined communications approaches used by these two groups, the thesis argues that key differences during especially intense periods of conflict — specifically, between June and October 2014 — reflect the divergent ways in which Hamas endorses, and the Islamic State disrupts, the prevailing world order as each pursues their own cause. It also notes that much of the recent scholarship highlighting the use of social media by non-state armed groups overestimate the impact of the virtual world on the actions of their followers in particular and attempts to influence the hearts and minds of a global audience more broadly.