A protest outside Sydney Opera House in the days after the October 7 attack on Israel was a “critical moment” in the rise of anti-Semitism in Australia, a Senate estimates hearing has been told.Australia’s Special Envoy on Antisemitism Jillian Segal told the hearing on Thursday the nation could have taken a “different trajectory” if the October 9 protest had been dealt with differently.Hundreds of people marched outside the world-famous landmark days after Hamas’ surprise attack which killed 1200 people, and Israel’s retaliatory strikes on Gaza, some chanting “hateful things” about Jews, Ms Segal said.While Ms Segal acknowledged dispute over allegations...