The evidence confirms a dramatic rise in antisemitic incidents targeting synagogues since October 7, 2023. The Community Security Trust (CST) recorded record annual totals of synagogue-related incidents — 223 in 2024 and 227 in 2025 — and noted that 46% of the 2024 synagogue incidents contained Israel-related rhetoric. CST attributes the overall surge to the October 7 "trigger event" and the ongoing Middle East conflict, and explicitly states that "an attack on a synagogue is not a political statement against Israel, but an assault on Jewish life in the United Kingdom." CST does not identify the protest marches as the direct cause of synagogue attacks; rather, it frames the marches as part of a broader post–October 7 climate of elevated anti-Jewish hostility. The claim's key word is "directly." The evidence does not establish a direct causal chain from the marches to synagogue attacks: - **Counter-terrorism investigations point elsewhere.** Multiple arson attacks on synagogues and Jewish sites in London (e.g., Finchley Reform Synagogue, East London Central Synagogue, Jewish ambulances at Machzike Hadath Synagogue) have been claimed by a group called HAYI (Harakat Ashab al-Yamin al-Islamia). The UK government subsequently banned this group and Iran's IRGC, stating that IRGC Qods Force "almost certainly directed" its attacks across Europe. This indicates state-sponsored terrorism as the driver of these specific synagogue attacks, not the protest marches. - **The Heaton Park Synagogue terrorist attack (October 2025)** was described by CST as "inspired by Islamic State," with the perpetrator motivated by "Islamist extremist ideology and anger towards Israel" — not by the marches. - **No evidence links march participants to synagogue attacks.** While CST notes that some synagogue incidents involve Israel-related rhetoric (e.g., anti-Israel posters placed near synagogues, or "Free Palestine" shouted at Jewish people), these are classified as antisemitic incidents in their own right, not as consequences of the marches. Community members quoted in the press do perceive a direct link — e.g., "If you have people on the street shouting 'globalise the intifada' don't be surprised if someone actually goes and does it." These are expressions of concern about a broader radicalising atmosphere, not evidence of a specific causal mechanism. In summary, there is a strong temporal correlation between the post–October 7 period (including the marches) and increased antisemitic incidents at synagogues, and the marches plausibly contribute to a broader climate of hostility. However, the evidence for the marches *directly* causing synagogue attacks is weak. The specific attacks that have been investigated are attributed by counter-terrorism police and the UK government to Iran-backed proxy groups and Islamist extremism, not to the protest marches. The claim conflates the broader atmosphere of anti-Israel hostility with the marches themselves as the direct cause, which the available evidence does not substantiate. Sources: - CST Antisemitic Incidents Report 2024: https://cst.org.uk/data/file/6/1/Antisemitic%20Incidents%20Report%202024.1738928091.pdf - CST Antisemitic Incidents Report 2025: https://cst.org.uk/research/cst-publications/antisemitic-incidents-report-2025 - CST Antisemitic Incidents Report 2025 (PDF): https://cst.org.uk/data/file/d/5/CST%20Incidents%20Report%202025.1770221912.pdf - CST Antisemitic Incidents Report January–June 2025: https://cst.org.uk/research/cst-publications/antisemitic-incidents-report-january-june-2025 - Reuters, "UK police examine Iran links to arson attacks on Jewish targets" (April 19, 2026): https://www.reuters.com/world/uk/another-attempted-arson-attack-jewish-site-london-charity-says-2026-04-19/ - NBC News, "U.K. says an Iran-backed group was behind attacks on Jewish community, bans Revolutionary Guard": https://www.nbcnews.com/world/united-kingdom/iran-irgc-islamic-revolutionary-guard-council-banned-uk-rcna587265 - CNN, "As attacks on Europe's Jewish communities escalate, Iran may be recruiting operatives online" (May 11, 2026): https://www.cnn.com/2026/05/11/europe/europe-antisemitic-attacks-online-groups-iran-claim-intl-cmd/ - The Independent, "Mystery of pop-up Iran-linked 'terror group' that claimed responsibility for Golders Green attacks": https://www.independent.co.uk/news/uk/home-news/golders-green-stabbing-attack-london-harakat-hayi-b2967874.html - BBC News, "Counter-terror investigation into east London synagogue fire": https://www.bbc.co.uk/news/articles/c89370yygx5o - BBC News, "Ninth person arrested over Jewish ambulance arson": https://www.bbc.com/news/articles/c07281gye3mo - The Telegraph, "Britain's Jews knew an attack was coming. Nobody listened" (October 3, 2025): https://www.telegraph.co.uk/news/2025/10/03/why-jews-had-feared-the-manchester-attack/ - The Standard, "Pram set alight in 'arson attack' at block of flats in Golders Green": https://www.standard.co.uk/news/london/arson-attack-jewish-families-flat-golders-green-london-b1284692.html