[1/4] Participants of a pro-Palestinian rally react outside the Sydney Opera House in Sydney, October 9, 2023. AAP Image/Dean Lewins via REUTERS Acquire Licensing Rights SYDNEY, Oct 10 (Reuters) - Australian police said on Tuesday they were investigating a pro-Palestinian protest outside Sydney Opera House, after footage emerged of a small group appearing to chant anti-Semitic slogans at the demonstration. Around 1,000 pro-Palestinian supporters marched through downtown Sydney on Monday evening to the city's iconic Opera House, which the government had illuminated in the colours of the Israeli flag following Saturday's attacks by Hamas which Israel says killed over 900....