Sydney Protestors Celebrate Hamas Atrocities, page-35

Were any arrests made? One arrest was made when a guy waving the Israel flag was arrested for "breaching the peace". The way is clear for officials to make arrests but they will only get around to it after morning tea.

Advocating terrorism

It is an offence to counsel, promote, encourage or urge the doing of a terrorist act or the commission of a terrorism offence where the person intentionally engages in the conduct and is reckless as to whether another person will engage in a terrorist act or commit a terrorism offence.

If found guilty of advocating terrorism, a person could face up to five years imprisonment.

For the purposes of this offence, a 'terrorism offence' is limited to a 'terrorism offence' as defined in subsection 3(1) of the Crimes Act that is punishable by a least five years imprisonment and is not an ancillary offence in Part 2.4 of the Criminal Code.
https://www.ag.gov.au/national-security/australias-counter-terrorism-laws/urging-violence-and-advocating-terrorism-offences