Neo-Nazi Thomas Sewell has been remanded in custody until at least Friday after Victorian Police opposed his bail application over an attack on Camp Sovereignty in Naarm/Melbourne.

Mr Sewell, 32, a New Zealand-born leader of the National Socialist Network (NSN), was arrested on Tuesday outside Melbourne Magistrates' Court. He has been charged with 25 offences, including violent disorder, affray, assault by kicking and discharge of a missile.

The attack on the camp was disavowed across the political spectrum, with Aboriginal leaders expressing their horror at the events on Sunday.

Prosecutor Jonathon McCarthy told the court Mr Sewell posed an "unacceptable risk" to community safety and should not be released on bail.

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Footage shows Mr Sewell leading about 30 men from the NSN towards Camp Sovereignty on Sunday after leaving an anti-immigration rally, where he had earlier addressed crowds on the steps of Victorian Parliament.

The camp, established by Krautungalung Elder Robbie Thorpe, is described as a place of peace where community can gather, yarn and reflect. It is located at the resting place for the repatriated remains of 38 Aboriginal Victorians.

According to the Herald Sun, Detective Senior Constable Saer Pascoe told the court on Wednesday that Mr Sewell, who is already on two sets of bail, was unemployed and spent his time leading the NSN. It was alleged Mr Sewell stormed Camp Sovereignty, punching and kicking several occupants, with one victim held down during the attack.

Footage shows Mr Sewell punching one occupant and kicking another, Detective Pascoe said.

"I'm almost certain he will return to committing offences," he told the court. "There is a real and likely risk of serious injury or death."

Detective Pascoe also noted Mr Sewell's actions on Tuesday, when he interrupted a press conference featuring Premier Jacinta Allan, calling her a "coward" and shouting "Heil, Australia" before being confronted by police.

Mr Sewell's lawyer argued there was evidence the incident was not an "unprovoked attack" and said his client should not have to disavow his political beliefs in order to meet bail requirements, as suggested by prosecutors.

Mr Sewell will return to court on Friday when a decision on his bail application is expected.