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Glynn argued he collected flags, and owned more than 50.

In relation to his social media posts, he said he was a supporter of the Palestinian people.

“Yes, I’m a doomsday prepper, I have information downloaded, I’ve had the time, I’ve had the money, but I don’t intend to harm anyone, I haven’t followed through with procuring anything,” he said.

“I keep to myself, my neighbours hardly know me, I’ve never had an issue with the law. I’m not a violent person, I’m quite the opposite.”

Magistrate Ben Tyers said the alleged actions, reported to police by a member of the public, represented a danger to the community.

“There’s nothing illegal or improper with supporting the Palestinian cause, what is not proper is posting online comments supporting a massacre of innocent civilians,” he said.

He also added “boxes and boxes” of ammunition and weapons stowed around the house was of “considerable concern”.

Glynn was refused bail and is due to reappear in court in February.

In the wake of the arrest, Prime Minister Anthony Albanese said there was no place in Australia for antisemitism, hate or violent ideologies.

“I have been briefed on the recent arrest in WA by the AFP Commissioner and the acting WA Premier,” he said.

“I thank the work of the WA Police in quickly identifying this individual and acting immediately.

“Federal agencies through the Joint Countert Terrorism Team have offered full support to WAPOL [WA Police].”

WA Police Minister Reece Whitby said any behaviour that is dangerous, threatening or hateful should be reported to authorities.

“We have almost three million sets of eyes out there, everyone can be watching, not just police, but everyone, the entire West Australian community can be watching for this kind of post that talks about threats to our community,” he said.