One Muslim neighbour spoke of jibes Osborne had made to her son.
Mum-of-six Khadijah Sherazi, a British Islamic convert, moved next door to Osborne six months ago.
She said Osborne had called her son "inbred" out of the blue.
She added: “My partner is Pakistani, sometimes they marry their cousins so white people call them inbreds.
“When I wear the full hijab I get called racist names. I don’t wear it round here because I know half the people don’t like it.
"He just said inbred to my 12-year-old son Nadeem."
But, the comment did not stop her being surprised to see Osborne named as the suspect.
She said: “This is a complete shock, I thought he was a normal neighbour, laughing and joking. He fixed my leaky tap the other day.
“He seemed like a good dad, he takes the kids to school and back every day and walks the dogs.”
Saleem Naema, who is from Iraq, lives on the same road.
He said: “I couldn’t believe when I realised it was him who was accused.
“We’d say hello everyday when dropping the kids off at school and he never had a problem with me at all.
“I’m a Muslim and he was never nasty or racist towards me.”
How the attack on Sunday night unfolded Police and ambulance crews raced to the scene at Finsbury Park after pedestrians were mowed down close to a mosque Credit: Rex Features Flowers and tributes have been left in Finsbury Park, North London following the attack Credit: Getty Images
A man looks for help to find his sister after the Finsbury Park mosque attack Credit: Rex Features Those who knew Osborne from his days in Weston-super-Mare told yesterday how he was forced to leave the area after a string of violent clashes fuelled by drink.
Pal David Main said: “He was a serious fighter who got off on violence and liked to be the centre of attention.
“That was probably what the van was all about.
“He stayed with my family for a while but would get scary and drink and was always in trouble.
“But this is still shocking.”
Another woman from Weston, who asked to remain anonymous told the Daily Mail: "The words I would use to describe Darren would be a 'bloody psycho'.
"He is vile. He would just drink too much and flip the switch I guess. I only witnessed one of his fights. It must have been 15 odd years ago."
A former barmaid in the area told the paper Osborne had once grabbed her by the throat and pinned her against a wall as she worked.
Osborne was allegedly said to have hired the white van used in the attack for £80 Credit: Rex Features A man caught up in the rampage last night is approached by an emergency officer Credit: Rex Features Messages of support have been left outside Finsbury Park Mosque in the wake of the tragedy Credit: Getty Images Media outside the North London mosque the day after the atrocity Credit: PA:Press Association Neighbours in Cardiff spoke last night about Osborne’s aggressive behaviour.
Peter Mackuin, 53 said: “Around two weeks ago I saw him and he was a right state.
“He looked like he’d been crying. Something was definitely wrong.
“His missus had been out looking for him as he had been gone all day after a blazing row. I saw him wandering out of the woods.”
Stephanie Kibble, 22, said: “He was in my house a week ago helping my mum with her TV.
“He was lovely with us but there were always police around because he argued with his wife and had trouble with his eldest daughter.”
Pharmacist Rebecca Carpenter, 26, said: "He's quite a shouty person, always shouting at his wife and kids - he seemed aggressive and strange.
“He drove around in an old car that was always damaged — but he has never caused us any real problems, but we could often hear him shouting from the other side of the street.”
Another neighbour said: “I actually heard him singing in the street yesterday — weird really. I never knew what he did for a living but Sarah is a hard worker.”
Emergency services tended to the injured after the 12:20am attack in Finsbury Park on Monday morning Credit: Rex Features Cops outside the Cardiff home of suspect Darren Osborne Credit: Roger Donovan / Mediaphotos Londoners have been leaving messages of support at the scene of the attack Credit: Getty Images Osborne grew up in Weston- super-Mare, Somerset, before moving to Cardiff with Sarah and their four children, who are aged between five and 16.
He used to work as a barman but had been jobless for some time.
Chef Sarah is the family’s breadwinner, working at an upmarket pub in the affluent suburb of Lisvane.
Osborne allegedly hired the van used in the attack from Pontyclun Van Hire for £80.
The firm’s spokesman said: “We at Pontyclun Van Hire are shocked and saddened by the incident that took place at Finsbury Park last night.
“We are co-operating fully with the Metropolitan Police investigation and our thoughts are with those who have been injured in this cowardly attack.”