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A loosely connected global network of online actors involved in illicit and harmful activities, like swatting, sadistic online exploitation (SOE), ransomware attacks, and distributing child sexual abuse material.
A glossary that explains some of the popular terms, references, and images used to signal transgression and belonging in online communities that glorify mass violence and extremist killings.
Meta CEO Mark Zuckerberg posted a video to Facebook in January 2025 announcing dramatic changes to the company’s content moderation policies. In the clip, the 40-year-old executive shared his commitment to restoring free expression and to making sure that “people can share their beliefs and experiences” on Meta platforms. In reality, our research has shown that these policy changes have resulted in a dramatic increase of antisemitism and extremism on Meta’s…
ADL examined the strategic evolution of anti-Israel activism on U.S. campuses and provides recommendations for universities to respond proactively to changing tactics.
When ADL published its first report on 9/11 conspiracy theories in 2003, it noted that the internet allowed an “unprecedented cross-fertilization of antisemitic ideas” and that they contributed to a “new form of global antisemitism.” The report also noted that these conspiracy theories were likely to endure and “form the basis of a new antisemitic canard that will linger for decades and be used to demonize Jews and Israel.” The report was prescient. The so…
Investigations follow Brandeis Center, ADL and StandWithUs complaints alleging young Jewish students faced anti-Semitic harassment, retaliation and hostile educational environments at a California public school and New York performing arts college Washington, D.C., September 10, 2026 – The U.S. Department of Education Office for Civil Rights (OCR) has opened two federal civil rights investigations into the Etiwanda School District in California and the American Musical Dramatic Academy …
25 years after 9/11, the threat of Islamist extremism hasn't disappeared — it has evolved. Today's terror groups use social media to reach millions globally, across borders, and sometimes without ever communicating directly with them.
Over the past two years, Pennsylvania has faced a broad range of extremist incidents, driven by a diverse mix of ideological motivations and groups.
The form of targeted violence is driven by perpetrators primarily seeking attention, notoriety, or status within online communities, like the True Crime Community.
Since 2024, the ADL Center on Extremism has identified at least eight attackers who were active on this gore and violence forum prior to carrying out their acts of violence.
This ADL Center on Extremism report details and analyzes the domestic extremist-related murders in the United States in 2024
This report provides a snapshot of antisemitism and extremism in Oregon and Washington, highlighting key trends tracked by the ADL Center on Extremism.
New York, NY, September 4, 2026 — Today, ADL (the Anti-Defamation League) released Five Asks for Hospitals and Healthcare Institutions, calling on healthcare leaders to take concrete steps to prevent and address antisemitism and ensure Jewish patients, healthcare professionals, students and trainees can receive care, work and learn in environments free from discrimination and harassment. The recommendations come as the U.S. Department of Health and Human Services (HHS) Office for…
In a new study, the ADL Center on Extremism found 1.8+ million unique pieces of extremist or hateful content on Steam.
The ADL Center on Extremism (COE) conducted a comprehensive analysis of violent antisemitism and anti-Israel content on Telegram following the 10/7 attacks.
A look at the 10 most prevalent trends in antisemitic messaging, tactics, and patterns post-Oct. 7
The ADL Center on Extremism tallied 2,087 anti-Israel incidents on U.S. college campuses between June 1, 2023, and May 31, 2024.
In 2023, ADL recorded its highest ever number of white supremacist propaganda incidents, with a total of 7,567 cases, a 12% increase from 2022.
This ADL Center on Extremism report details and analyzes the domestic extremist-related murders in the United States in 2023.