A survivor of the Bondi attacks, who became the centre of online conspiracy theories, and a member of one of Australia's richest families are among royal commission witnesses on Monday.The national anti-Semitism probe resumes in public view this week after a behind-closed-doors stretch focused on security issues.For the next fortnight, commissioners will be trained on the role of media - particularly the ABC and SBS - and the nature, prevalence and drivers of anti-Semitism and other hate speech on social media.Arsen Ostrovsky knows first hand how social media can amplify disinformation from his experience following December 14, 2025.Mr Ostrovsky, separated...