A high school student has delivered testimony regarding how falling into a social media rabbit hole resulted in his plot to execute a terrorist bombing against the Sydney Opera House.
The 16-year-old youth, whose identity is protected under legal restrictions, entered a guilty plea for preparing a terrorist act across a period exceeding one month during 2024.
During a sentencing proceeding within the New South Wales supreme court on Tuesday, the adolescent described how he was progressively subjected to escalating degrees of online Islamic extremism.
The court was informed that he first encountered extremist content via TikTok during 2024 at age 14, becoming captivated by historical chronicles of past conquests.
“It was historical … the time of the Crusaders, empires a long time ago,” the 16-year-old recounted to the court.
Footage covering the aftermath of the September 11 terrorist attacks alongside Islamic State propaganda was presented to him with growing frequency, and the clips escalated in violent intensity, according to the youth.
As his radicalisation deepened, he initiated conversations with individuals via the encrypted messaging platform Telegram regarding his ambition to understand how to carry out terrorist acts.
“Did you like talking to them?” inquired defense counsel Michael Valentin.
The teenager answered: “Yes, I found it interesting … [they were] a new group of people, I was trying to relate to them.”
The youth indicated that he subsequently started investigating methods to bomb the Sydney Opera House during one of its most crowded occasions—the day of the Sydney Marathon.
Because the iconic venue functions as the finish line for the prominent international competition, it represented an optimal site to inflict maximum casualties, stated the 16-year-old. He drew inspiration after viewing clips regarding the 2013 Boston Marathon attack, in which two explosive devices detonated near the finish line killed three individuals and injured over 500 others.
The boy conceded sending an online message stating: “I am picking the location, places where lots of people and tourists are out.”
“I will test and then do the operation, inshallah [God willing].”
He noted that his rationale for plotting the violence was captured in a text declaring: “the country I am living in helped America evade Iraq and Afghanistan and killed many Muslims”.
Despite formulating comprehensive preparations, he testified he was merely “50/50” regarding whether he would ultimately detonate a bomb.
He described experiencing an internal “little voice” attempting to discourage him from perpetrating acts of terror.
On Tuesday, the boy stated that he renounced all principles championed by the Islamic State and no longer held radical beliefs.
“I’m deeply sorry for the things I did,” the youth expressed to Justice Stephen Campbell.
“Please show me some remorse.”
His defense attorney advocated for a non-prison sentence so that the adolescent could continue undergoing deradicalisation within society.
Subject to stringent home detention bail conditions since November 2024, the teenager had received permission to visit public events accompanied by his parents, such as the Vivid festival and the Royal Easter Show.
“Clearly, we have before you a young man who … has seen the errors of his ways,” stated Valentin.
“Thankfully he is now out of the rabbit hole.”
Crown prosecutor Sophie Callan SC recognized the “candid” nature of the boy’s testimony, yet maintained that an immediate term of imprisonment was the only suitable outcome.
“There remains a level of naivety in expressions of insight … that would leave Your Honour with a degree of caution,” Callan argued.
Justice Campbell is scheduled to hand down the sentence on 29 October.
Originally published at https://www.theguardian.com/australia-news/2026/sep/01/teen-boy-planned-bomb-sydney-opera-house-terror-attack-ntwnfb.