The father of London Bridge terror victim Jack Merritt has said his son would be "livid" that his death is being used to further an "agenda of hate".
Cambridge University graduates Mr Merritt, 25, and Saskia Jones, 23, were both stabbed to death by 28-year-old convicted terrorist Usman Khan during a prisoner rehabilitation event they were supporting in London on Friday.
Khan was released from prison on licence in December 2018, halfway through a 16-year prison sentence after he was convicted of terror offences in February 2012.
The attack prompted the Ministry of Justice to review the licence conditions of every convicted terrorist released from prison, which Prime Minister Boris Johnson said was "probably about 74" people.
The family of Mr Merritt, from Cottenham, Cambridgeshire, asked for his death to not to be used to justify introducing "even more draconian sentences" on offenders.
Writing for the Guardian he said his son would be "livid" if he could comment on his death.
His father's comments came after family and friends attended a vigil in his memory in Cambridge on Monday.
The Cambridge vigil took place as Boris Johnson and Jeremy Corbyn stood side by side to pay their respects at a separate event at Guildhall Yard in London, observing a minute's silence alongside members of the public.
The event at the centre of the attack on Friday was organised by Learning Together, a programme associated with Cambridge University's Institute of Criminology.
Mr Merritt's father said his son "devoted his energy" to the programme, adding: "He lived and breathed fire in his pursuit of a better world for all humanity, particularly those most in need."
Miss Jones, a volunteer with Learning Together from Stratford-upon-Avon, Warwickshire, was described as having a "great passion" for providing support to victims of crime by her family.