For 20 years, ISD has delivered field-leading threat detection, analysis and real-world strategies to combat terrorism, extremism and authoritarianism - in all their ideological forms.

Antisemitism

Threats to Jewish communities and weaponised antisemitism are on the rise, driven by extremists, hostile governments and conspiracy theorists.

Combining our best-in-class digital research techniques with in-depth subject matter knowledge of extremist movements, ISD tracks antisemitism at scale and informs policymakers globally. We also build capacity amongst civil society groups through initiatives such as our Coalition to Combat Online Antisemitism (CCOA).

August 26, 2026

Online antisemitism and digital regulation: ISD’s submission to the Australian Royal Commission

This Dispatch contains an excerpt from an ISD expert report submitted to the Australia's Royal Commission on Antisemitism and Social Cohesion.

Antisemitism, Targeted Threats, Hate and Abuse

August 20, 2026

Lexical laundering: The mainstreaming of antisemitic neologisms from 4chan and forums

Antisemitism, Identity-Based Hate and Abuse, Misogyny, Targeted Threats, Hate and Abuse, Tech Accountability and Safety

July 23, 2026

Canadian nationalist group promotes self-proclaimed ‘Bigotfest’ on social media

Anti-Migrant, Antisemitism, Far-Right Extremism, Terrorism and Extremism

July 14, 2026

UFC terror plotters’ motivations raise questions about threat prioritization

Antisemitism, Hybrid Extremism and Nihilistic Violence, Terrorism and Extremism, Threat Analysis and Prevention

July 1, 2026

ISD’s Hannah Rose testifies before the Royal Commission on Antisemitism and Social Cohesion

Antisemitism

May 13, 2026

Building a strategic response to antisemitism in the UK in a changing threat landscape

Antisemitism, Targeted Threats, Hate and Abuse, Tech Legislation and Regulation, Threat Analysis and Prevention

May 5, 2026

Amplifying Antisemitism: How Recommender Algorithms Serve Harmful Content to Children

Antisemitism, Recommender Systems and Algorithms, Tech Accountability and Safety

May 2, 2026

Recommendation systems and the rapid exposure to antisemitism online

Antisemitism, Recommender Systems and Algorithms, Tech Accountability and Safety

April 22, 2026

The impact of the war with Iran on antisemitic discourse

Antisemitism, Targeted Threats, Hate and Abuse, Tech Accountability and Safety

Further Reading

November 23, 2023

Condemn, condone, converge: German extremist and conspiracist responses to the Israel-Gaza crisis

In Germany, extremists and conspiracy theorists use the Israel-Hamas conflict to polarise politics. This Dispatch analyses their impact.

Antisemitism, Far-Left Extremism, Far-Right Extremism, Hybrid Extremism and Nihilistic Violence, Islamist Extremism, Targeted Threats, Hate and Abuse, Terrorism and Extremism

November 23, 2023

Anschuldigen, anprangern, anstacheln: deutsche extremistische Reaktionen auf den Israel-Hamas Konflikt

In Germany, extremists and conspiracy theorists use the Israel-Hamas conflict to polarise politics. This Dispatch (in German) analyses their impact.

Antisemitism, Far-Left Extremism, Far-Right Extremism, Hybrid Extremism and Nihilistic Violence, Islamist Extremism, Targeted Threats, Hate and Abuse, Terrorism and Extremism

November 21, 2023

Uniting Against Antisemitism: Empowering Transatlantic Civil Society Responses to Online Antisemitism

An action-oriented online capacity building workshop to address the rising challenge of online antisemitism.

Antisemitism

November 15, 2023

US extremists seeking “to further divide or create violence” in support of Hamas

ISD’s research on the Israel-Hamas conflict was featured in ABC News along with commentary from ISD’s Executive Director at AMEA Moustafa Ayad.

Antisemitism, Far-Right Extremism, Islamist Extremism, Terrorism and Extremism

November 13, 2023

Hate united: Neo-Nazi accelerationist support for Hamas 

Neo-Nazi accelerationists have been expressing support for Hamas since October 7, using antisemitism to recruit and radicalize followers.

Antisemitism, Far-Right Extremism, Targeted Threats, Hate and Abuse

November 9, 2023

Hate of the Nation: A Landscape Mapping of Observable, Plausibly Hateful Speech on Social Media

This analysis produced by ISD for Ofcom explores the scale and nature of ‘plausibly hateful’ English-language content across platforms.

Anti-LGBTQ+, Anti-Migrant, Antisemitism, Targeted Threats, Hate and Abuse

November 5, 2023

Antisemitism and anti-Muslim hate speech surges online following Hamas’ terrorist attack

ISD's Hannah Rose told CBS' Face the Nation about our research on rising online antisemitism and anti-Muslim hate speech after the 7 October attacks.

Antisemitism, Targeted Threats, Hate and Abuse

October 31, 2023

Rise in antisemitism on both mainstream and fringe social media platforms following Hamas’ terrorist attack

The 7 Oct Hamas attack has triggered a 50-fold rise in antisemitic comments on YouTube and spikes on alt-tech platforms, according to ISD analysis.

Antisemitism, Targeted Threats, Hate and Abuse, Tech Accountability and Safety

October 31, 2023

Online antisemitism soars, with a 51-fold surge in antisemitic YouTube comments following Hamas’ attack

Euronews covers ISD's investigation on rising online antisemitism on mainstream and fringe social media platforms following Hamas’ terrorist attack.

Antisemitism, Gaming and Alternative Platforms, Targeted Threats, Hate and Abuse

October 16, 2023

Far left, far right antisemitism likely to rise amid Israel-Hamas conflict

POLITICO features our Explainer on far-left antisemitism, explaining how there has been a long history of conflating Jews, Zionism and Israel.

Antisemitism, Democratic Integrity, Far-Left Extremism, Far-Right Extremism, Targeted Threats, Hate and Abuse, Terrorism and Extremism

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