A pro-Palestine rally was staged at the Opera House just after the Hamas attack on Israel in 2023. (Dean Lewins/AAP PHOTOS)A pro-Palestine rally was staged at the Opera House just after the Hamas attack on Israel in 2023. "The Opera House has its own (regulations) and engineering requirements which says that they cannot facilitate the amount of people the (organiser) has indicated are likely to attend." "The Opera House is predominantly surrounded by water, there is only a couple of small pinch points which they can safely get people out from there," he said. The event would mirror a controversial, snap pro-Palestine rally on the steps of the opera house days after Hamas attacked Israel, killing 1200 people and taking hundreds more hostage.