Center on Extremism
We track extremist trends, ideologies and groups across the ideological spectrum. Our staff of investigators, analysts, researchers and technical experts strategically monitor, expose and disrupt extremist threats.
Featured Article
Democratic Socialists of America (DSA)
DSA has grown into the largest socialist organization in the U.S., with over 120,000 members, and in 2025 made anti-Zionism a binding condition of membership. Many DSA-backed candidates have translated their anti-Israel and anti-Zionist agenda into political power, including New York City Mayor Zohran Mamdani.
Latest from the Center on Extremism
Antisemitic Themes Punctuate the 2026 Election Cycle Nationwide
The Faculty Factor: Inside the Networks Driving Anti-Israel and Anti-Zionist Activism on Campus
Khamenei’s Week-Long Funeral Procession Displays Violent Antisemitic and Anti-Israel Incitement
From San Diego to Montreal: Antisemitism Serves as a Throughline in Recent Extremist Shootings
Keeping the Lights On: How Cloudflare Sustains Violent Extremism, Graphic Violence and Terrorism Online
San Diego Mosque Shooters' Apparent Manifestos Reveal Anti-Muslim Extremism, Antisemitism, and Broader Extremist Ideology
Chants of 'Death to Zionists,' Hamas Flags and Support for 10/7 Attack Mark Some Nakba Day Rallies
Audit of Antisemitic Incidents 2025
ADL’s 2025 Audit of Antisemitic Incidents recorded 6,274 antisemitic incidents across the United States. Incidents decreased significantly in 2025 compared to 2024, but levels remained much higher than in years prior to 2023. The year 2025 was the third highest on record since ADL began tracking antisemitic incidents in 1979.
Matthew Hatcher/Getty Images
The aftermath of an arson attack at the Pennsylvania Governor's Mansion and Gov. Josh Shapiro's residence on April 13, 2025, in Harrisburg, Pennsylvania.
(Image posted to Telegram)
Members of white supremacist fight crews participating at a Forest Fights event.
In This Week's extremely Newsletter
White Supremacists Are Using ‘Fight Nights’ to Attract Teen Recruits
Read more on the weekly newsletter from the ADL Center on Extremism and your go-to resource for emerging trends and developments in extremism and hate.
Resources
H.E.A.T. Map
This interactive map provides details on specific incidents of hate, extremism, antisemitism and terrorism, and allows users to better understand extremist tactics, compare activity by type and/or state and access and download raw data.
Revealed: Anti-Zionist Hate
Logos, symbols, imagery and slogans used by large segments of the anti-Zionist movement, particularly since the antisemitic terror attack by Hamas on October 7, 2023.
Hate Symbols
An overview of many of the symbols most frequently used by a variety of white supremacist groups and movements, as well as some other types of hate groups.
extremely Podcast
Our podcast series hosted by experts from ADL Center on Extremism gives audiences a window into the daily work of fighting – and disrupting – extremism and hate.
Frequently Asked Questions
COE is the nation's foremost nongovernmental authority on extremism, leveraging cutting-edge tools and decades of expertise to deliver essential data, analysis and resources on antisemitism, extremism and hate to policymakers, industry leaders, law enforcement and the public.
- COE tracks and reports on antisemitic and extremist trends and behavior across the full ideological spectrum, serving as a trusted resource for media, community organizations, nonprofit partners and others.
- COE's work directly helps protect Jewish communities from threats rooted in antisemitism and extremism.
- COE produces in-depth research and analysis on extremism, antisemitism and all other forms of hate.
- COE staff includes investigators, analysts, researchers and technical experts, ranging from former law enforcement officers and military personnel to scholars and other subject matter experts.
- COE uses proprietary tools to organize, track and analyze data in support of its work. These tools rely exclusively on open-source intelligence; COE does not hack into private spaces or circumvent any site or platform security protections.
- COE produces and maintains key resources including the ADL H.E.A.T. Map™ (an interactive tool tracking hate, extremism, antisemitism and terrorism incidents), the Hate on Display™ Hate Symbols Database and the extremely™ newsletter and podcast.
The H.E.A.T. Map™ is an interactive tool that provides details on specific incidents of hate, extremism, antisemitism and terrorism. It allows users to better understand extremist tactics, compare activity by type and/or state and access and download raw data compiled by COE researchers.
ADL's Hate on Display™ Hate Symbols Database provides an overview of many of the symbols most frequently used by a variety of white supremacist groups and movements, as well as some other types of hate groups.
ADL’s 2025 Audit of Antisemitic Incidents recorded 6,274 antisemitic incidents across the United States in 2025, the third highest year on record since ADL began tracking antisemitic incidents in 1979.
- Average of 17 incidents per day
- 203 violent assaults
- Physical assaults increased by 4%
- Total decreased by 33% from 2024, but the 2025 figure is 70% higher than in 2022.
Sign up for extremely™, the weekly newsletter from the ADL Center on Extremism and a go-to resource for emerging trends and developments in extremism and hate.
This work is made possible in part by the generous support of
- Anonymous (4)
- The ADL Lewy Family Institute for Combatting Antisemitism
- David Berg Foundation
- Crown Family Philanthropies
- Lillian and Larry Goodman Foundations
- Klarman Family Foundation
- Mastercard Impact Fund
- Morton H. Meyerson Family Foundation/Marlene Nathan Meyerson Family Foundation
- Charles and Mildred Schnurmacher Foundation
- The Nancy K. Silverman Foundation
- The Tepper Foundation
- The Harry and Jeanette Weinberg Foundation
- Zegar Family Foundation