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).

May 13, 2026

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

Amid recent attacks on the Jewish community, this brief calls for a PM-led framework linking digital regulation, prevention & counter-extremism.

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

December 23, 2025

Australian Jewish leaders urge government action to combat antisemitism

Antisemitism

December 23, 2025

Bondi Beach: The hallmarks of an Islamic State attack 

Antisemitism, Islamist Extremism, Threat Analysis and Prevention

December 22, 2025

Recent arrests in Toronto highlight Islamic State threat to Jewish community

Antisemitism, Islamist Extremism

December 22, 2025

Antisemitism across the extremes: A deep-dive on US-based violent online networks

Antisemitism, Hybrid Extremism and Nihilistic Violence

October 10, 2025

The Manchester synagogue terrorist attack: A snapshot of online antisemitism and extremist exploitation

Antisemitism, Terrorism and Extremism

Further Reading

December 20, 2023

Antisemitic riots in Russia: How misinformation spread online fueled violence

Following antisemitic riots in Dagestan, Russia blamed Ukraine & the West for the tension, but ISD analysis of pre-riot messages questions this claim.

Antisemitism, Information Warfare and Online Manipulation, Targeted Threats, Hate and Abuse

December 20, 2023

Islamophobic and antisemitic discourse on social media after the October 7th attacks

Zahed Amanullah will be speaking on Islamophobic and Antisemitic discourse on social media.

Anti-Muslim, Antisemitism

December 15, 2023

Cross-ideological antisemitism and the October 7th attacks

This briefing analyses how different ideological groups united in promoting antisemitic conspiracy theories after Hamas' 7 October attacks in Israel

Antisemitism, Targeted Threats, Hate and Abuse, Terrorism and Extremism

December 7, 2023

GOP presidential candidate validates the ‘Great Replacement’ conspiracy theory on the debate stage

ISD Senior Research Analyst Jared Holt spoke to WIRED about the implications of Vivek Ramaswamy’s reference to the ‘Great Replacement'.

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

December 4, 2023

Unpacking antisemitic narratives about the Hamas attack and the Israel-Hamas Conflict within YouTube comments

ISD analysis the types of online antisemitism seen in the wake of the Hamas attack on Israel and the subsequent conflict, in YouTube comments.

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

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

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