A chemistry teacher who planned to travel to Syria to fight alongside Islamic State prepared himself to commit "multiple acts of murder", a court has heard.
Jamshed Javeed, 30, was among a group of young Muslim men who became radicalised and "determined to fight Jihad" in 2013.
He helped his younger brother Mohammed and two other men join the terrorist group, also known as Isis, in Syria by providing money for flights as well as clothing and equipment, Woolwich Crown Court in London heard.
Javeed is then said to have prepared to travel to the country with another member of the group, Nur Hassan, to fight with Isis and their fellow Britons against government forces.
In November 2013, he bought clothing, equipment and flight tickets but he was stopped from travelling by his family, who hid the clothes he had prepared, along with his passport.
Javeed, who is married with a young child, pressed ahead with his plans despite the pleas of his wife and family not to go, prosecutor Simon Denison QC said.
He said: "He persisted, buying more clothing and equipment to take with him for himself and others, and applying for a replacement passport."
The teacher, from Levenshulme, Manchester, was arrested in December 2013 and police found material on his mobile phones and computers providing evidence of a "violent Islamist ideology" and his "intention to engage in acts of terrorism in support of that Islamist ideology".
Javeed, who taught 11-to-16-year-olds at Sharples High School in Bolton, pleaded guilty last year to two counts of engaging in conduct in preparation of terrorist acts.
He accepts he intended to travel to Syria to join rebels against the "vicious" Assad regime but in a basis of plea he claimed he has never supported "the aims of Isis as now revealed and understood" and insisted he is not an extremist.
Mr Denison said it was clear the action Javeed intended to engage in "would have involved the use of firearms and/or explosives".
He said: "This case, of course, is not about who is right, and who is wrong, in the conflict in Syria - as if anyone could say.
"It is not about humanitarian aid. Nor is it about the religion of Islam.
"It is about the defendant assisting others in preparing, and preparing himself, to commit multiple acts of murder in guerilla warfare to advance their religious or ideological cause."
The sentencing hearing is scheduled to last two days.
Javeed's younger brother Mohammed, 21, who studied mechanical engineering at John Moores University in Liverpool, left Britain to travel to Syria on October 6 2013, the court heard.
Mr Denison said it was believed he might have gone to Iraq with Isis but nothing has been heard of him for more than a year.
Mohammed Javeed travelled with Khalil Raoufi, who also attended John Moores and was killed in February last year, a day after his 20th birthday.
Before they left, Jamshed Javeed transferred a total of £1,400 to his brother, who bought winter clothing and flights.
Mohammed Javeed and Raoufi met up with another former student at the university, Raphael Hostey, when they reached Turkey on their way to Syria. Hostey remains in the war-torn country, the court heard.
The court heard the defendant's wife Shameila began suspecting that he was planning to travel to Syria after it emerged his brother had gone.
She texted him asking where his passport was, saying: "You have never used your passport in the past so it is strange that you feel the need to use it now."
In November, Javeed bought a solar charger at Maplins, travel provisions and flight tickets from Manchester to Istanbul.
But his travel plans were thwarted when his family removed his rucksack and passport and he was unable to find it.
The next day Hassan, 21, was subjected to a port stop in which police seized his phone and laptop. He missed his flight but travelled the next day, and has not returned.
Around a week later, Javeed spent several hundred pounds on outdoor clothing recommended by Raoufi, the court heard, as well as a Microsoft computer.
He also attempted to obtain a new passport, which was issued on December 12 and delivered to his school.
Several days earlier Javeed's wife told him she was pregnant with their second child but Mr Denison said the news "did not deter him from going".
In a text exchange, she expressed her disillusionment, saying: "No point in giving my opinion ... even if I am your wife."
Another message said: "Jamshed you refuse to take on board anyone's opinion unless I've got a gun and I'm in Syria."
The court heard a recording - made by Javeed's sister - of an emotional argument over his hiding of his brother's plans and his own intentions.
In it, his mother accuses him of being a "murderer" for helping his sibling to go and his parents say they will give evidence against him for encouraging him to go to fight.
Javeed says: "Lock me up. Am I bothered if they lock me up?
"You don't want me to go but I want to. And I am going to go, regardless."
His mother says to him in despair: "If this religion doesn't allow respect for a mother and father ... this is not the religion of my prophet, peace be upon him. Yours is a different religion. You have got into the kuffars (non-believers)."
She goes on: "They have become disobedient towards the religion. They are no longer under Islam.
"They have been taken over by somebody who is a real enemy of Islam. And he is having the young children of mothers killed. He is some tyrant. He is finishing the line of young Muslims."
Mr Denison said the recording is not important because of any argument about "the true meaning of Islam" but "because it shows the defendant's parents understood that he was going to Syria to fight, as his younger brother had gone, with his assistance, to fight. And likely to be killed.
"Not once in that argument did he deny it, or say anything about humanitarian aid."