A man has been charged over offensive comments he allegedly made during a pro-Palestine rally in Sydney's CBD on Sunday.

Police allege the 63-year-old man was one of thousands of people who attended a pro-Palestinian gathering in the wake of Hamas attacks earlier this month.

He was arrested at a home in Mt Druitt in Sydney's west about 8pm yesterday.

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The man has been charged with the use offensive language in/near public place/school.

He was granted strict conditional bail and is due to appear at Downing Centre Local Court on November 15.

Police are continuing to investigate.