A former Army cadet with an extreme hatred of women has been jailed for four-and-a-half years after he terrorised two girls, threatened to 'ruin' their prom and collected bomb-making videos.
Dihan Rahman, now aged 19, made a Nazi salute and held a rope noose in selfies and posted personal details of two girls and a teacher online during a stalking campaign.
Prosecutor Serena Gates KC said the defendant's electronic devices and notes revealed a 'mixed' ideology touching on the extreme right-wing, Islamic State, Incel and hatred of women.
She told the court: 'The common ground is the hatred of Jews and there is also material on how women are treated within those ideologies.'
Rahman had also been a 'trusted' administrator of an extreme right-wing network on Telegram, The Sturmjäger Division, having pretended to be a white youth, the court heard.
He pleaded guilty to three counts of stalking and three counts of possession of indecent images.
On the second day of his trial, Rahman, from west London, admitted three charges of possessing documents useful for terrorism.
They included a pipe bomb tutorial and a video on how to make TATP explosives.
Dihan Rahman, 19, from Uxbridge, West London, stalked a girl after she turned down his advances and threatened to carry out a Valentine's Day massacre
Rahman (seen making a Nazi salute) has an interest in extreme ideology, including right-wing extremism, Islamic and pro-Isis extremism, incel ideology and misogyny
He also sent a 'caricature of a man with a cartoonishly big nose' and the phrase 'Oy vey, Goyim' to a victim, later accusing her of believing in 'female superiority' because she took offense.
On Wednesday, Judge Simon Mayo KC sentenced him at the Old Bailey to four-and-a half years in prison with an extended licence period of three years.
He told Rahman: 'This is not a case of a single lapse or a moment of poor judgment.
'Much of the behaviour was planned, concealed, and persistent. It occurred over a prolonged period and, significantly, it continued even after the police became involved and you were subject to bail conditions.'
His stalking, which included making malicious professional complaints against the teacher, was 'persistent, calculated and highly intrusive', he said.
Judge Mayo added: 'The impact of your stalking was severe and enduring. The two young women lived in constant fear, altered daily routines, withdrew socially and restricted online activity.
'Their education suffered, a school prom was relocated twice with additional security, and one of the young women ultimately changed colleges. Both continue to experience anxiety and loss of confidence.
'No sentence I can pass will remove the anxiety, fear, and psychological harm which you caused your victims.'
The judge noted the defendant's autism spectrum disorder, emotional immaturity and social isolation, but said none of these factors excused his behaviour.
His defence lawyer said that his autism led to fixations, such as spending six months obsessed with the Battle of Waterloo before pivoting to bomb-making.
Previously, the court heard how problems began in 2023 after Rahman attended a new school and an Army cadet programme.
When one of the girls rejected Rahman's advances, he began sending them both abusive messages, jurors were told.
The former Army cadet with an extreme hatred of women has been jailed for four-and-a-half years
He specifically messaged a male cadet saying he planned to 'bleach all of their [the girls'] hair.'
One of the girls became aware that he was taking pictures of her and her female friends and he began 'spamming' her social media accounts.
After he was banned from the cadet base, Rahman posted on Snapchat and TikTok that he planned to 'ruin prom', forcing organisers to change the venue twice.
He used specific imagery to threaten the prom, including a picture of a WWII German soldier with a gun to indicate he would 'ruin' the event.
Rahman's friendship with the second girl was said to have deteriorated in early 2024 when he criticised her weight on Snapchat.
He specifically targeted the second girl because he perceived her as a barrier to his advances toward the first girl.
The girl, who was involved in organising the prom, told an adult and Rahman was given a two-day school suspension, the court was told.
The female teacher said she had no problems with him until he started sending the two girls Snapchat messages in January 2024.
The teacher seized his phone after he was reported for taking photographs of girls at school.
She saw a photograph of the defendant in cadet uniform holding a noose and caught him deleting images after she briefly left the room.
As she confiscated the device, she viewed a picture of Rahman with a headscarf around his face with an image saying 'Who's in for a Valentines school shooting'.
Another picture showed Rahman in Army uniform with the words 'kill yourself', images of Adolf Hitler, Saddam Hussein, beheadings and dead bodies, as well as depictions of violence against women.
Jurors were shown pictures of Rahman in military fatigues, giving a Nazi salute and holding a green cord tied in a noose.
The school placed him on 'one-to-one' care, meaning he wasn't allowed to walk the halls without a teacher, before he was eventually removed.
One victim noted that the harassment followed her to her new college via an email sent to her favourite teacher
He was arrested at his home on March 15, 2024 and given police bail on condition he stay away from the girls, which he failed to do.
In November 2025, Rahman was arrested again and an examination of his laptop revealed he had made 83 searches for the first girl that month. He was remanded in custody.
Further investigations revealed that documents about both girls had been released online with details about their family and social media accounts and saying they were a 'danger to males', jurors were told.
He complained about the 'women privilege' treatment by the school and cadets, even sending a letter from prison in January 2025 reiterating this view.
He also told teachers a story about a female cousin in Italy who supposedly tied him to a chair and locked him in a cupboard to justify his hatred of women.
Ms Gates told jurors this was 'doxxing' – an online practice of exposing personal information about others to encourage online trolls to harass them.
Rahman is pictured holding up a green cord tied in a noose
She went on to describe how Rahman had made official complaints against the teacher, pretending to be his own father.
Rahman had initially denied having documents useful for terrorism, claiming he had them for 'research'.
The two girls Rahman stalked attended his sentencing and made victim impact statements from behind a screen in court.
One of them said: 'I used to have a large social circle however because of this I am more cautious about the friends I have.'
Bethan David, head of counter terrorism for the Crown Prosecution Service, said: 'Dihan Rahman was driven by his extreme ideologies and misogynistic views.
'His derogatory views about women and his interest in mixed extreme ideologies drove him to commit the stalking offences causing considerable fear and distress to his victims, who have described the effect his actions have had on them.
'Today's sentencing reflects the seriousness of his crimes, and I hope can bring some closure to his victims, my thoughts remain with them.'
Head of Operations for Counter Terrorism Policing London, Detective Chief Superintendent Helen Flanagan said: 'This case is yet another example of a growing and concerning trend of young people being drawn into extremist, violent and terrorist ideologies – principally from what they are exposed to and consuming online.
'Rahman's actions towards his victims – two of whom were teenage girls – were completely unacceptable and I want to praise their incredible courage and resilience throughout this whole ordeal. I would also like to praise the actions of Rahman's teachers, who contacted police with their concerns, which enabled us to intervene and investigate when we did.
'This case shows why it is so crucial for those who are looking after children and young people to be aware of the signs that could indicate someone is on a path towards radicalisation. And our message is clear – if you have any concerns whatsoever, then ACT Early and contact us before it may be too late.
'But it also shows how seriously we take allegations of violence against women and girls, and that we will not hesitate to take action against somebody who is suspected of such sinister action towards women and girls.'