An expert on online hatred tells Australia’s royal commission that antisemitic content on social media rises sharply immediately after the Oct. 7, 2023 attacks. According to the submissions reported by multiple outlets, the expert describes a fivefold increase in antisemitism on social media in the period following the attack. The accounts say the evidence is presented to the commission as part of its consideration of online abuse and its impacts, including how quickly online hatred can spread in response to major real-world events. While the reports focus on the reported magnitude of the spike, they do not provide detailed methodology, specific platforms, or breakdowns of user behavior within the excerpts. The outlets agree on the core claim: an expert informs the commission that there is a significant and immediate escalation in antisemitic activity online after the Oct. 7 attacks. The reporting indicates the testimony is used to support the commission’s broader examination of online extremism and harassment.