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

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

September 26, 2023

The CCOA team hosted its digital launch, marking the kick-off of the working groups

Coalition to Counter Online Antisemitism (CCOA) team hosted a digital launch event.

Antisemitism

August 15, 2023

Sasha Havlicek on reactions against public interest research: “Who’s the censor now?”

ISD CEO Sasha Havlicek spoke with WIRED about the backlash ISD received after finding a spike in antisemitism after Elon Musk took over Twitter.

Antisemitism, Tech Accountability and Safety

July 21, 2023

‘Sustainability’ festival cancelled after activists expose it as a conspiracy theorist event

ISD’s Ciarán O’Connor spoke to VICE about the ‘Think Local Festival’ that was cancelled after organisers were exposed as being conspiracy theorists.

Antisemitism, Foreign Information Manipulation and Interference, Hybrid Extremism and Nihilistic Violence, Targeted Threats, Hate and Abuse, Terrorism and Extremism, Threat Analysis and Prevention

July 12, 2023

Far-Left Antisemitism

Far-left antisemitism has a long history and its impact continues to be felt today.

Antisemitism, Far-Left Extremism

May 17, 2023

Advocacy workshop: Experts convene on countering online antisemitism, holocaust denial and distortion

ISD, UNESCO, the World Jewish Congress and B’nai B’rith International are hosting an advocacy workshop.

Antisemitism

Previous 123456 Next