In a social media post, he allegedly expressed “100% support” for the December 14 mass shooting at a Jewish festival on Bondi Beach, which killed 15 people, media reports said.
Glynn reportedly told the court he did not intend to harm anyone and was trying to contrast the Bondi attack with the deaths of Palestinians in Gaza.
He was remanded in custody until his next court hearing in February, local media said.
Western Australia Police Commissioner Col Blanch said the man was not believed to be part of a network.
Police found six firearms, 4000 rounds of ammunition, and anti-Semitic material at his home. Photo / Getty Images
“We think this is an individual who has made these comments online, and we are still yet to assess the threat of that individual,” he told reporters.
Prime Minister Anthony Albanese said he had been briefed on the arrest.
“There is no place in Australia for anti-Semitism, hate and violent ideologies,” he said in a statement.
“I thank the work of the WA Police in quickly identifying this individual and acting immediately.”
-Agence France-Presse