Jewish Australians have reported a dramatic increase in harassment and intimidation online after giving evidence at the royal commission on antisemitism and social cohesion.Before starting hearings on Tuesday morning the commissioner, Virginia Bell, said at least one instance had been referred to the Australian federal police.“There is something I would like to say, and it concerns the harassment and intimidation to which members of the Jewish community who have given evidence before this commission have been subject,” Bell said.“We have received reports from a number of witnesses concerning a dramatic increase in online hate messages after they have given evidence....