The killer of Cypriot pensioner Eleftheria Demetriou, 79, was sentenced to remain indefinitely in hospital on Tuesday by the Old Bailey in London.
The court heard how Hakim Abdillahi, 38, from Djibouti repeatedly stabbed Demetriou at Morant Place in Wood Green in August of last year.
Abdillahi admitted to the manslaughter of the woman he believed at the time was the ‘antichrist’.
The “gentle and quiet” man had been friends with the victim and called her “grandma”, the jury heard, according to the BBC.
The killer, who was being treated for personality disorder was discharged from St. Ann’s Hospital in Haringey a month before the attack.
In his statement, the pensioner’s son Marios Demetriou said he was heartbroken and his whole family was in counselling.
He said his seven-year-old daughter was so affected by her grandmother’s death she could not go to school and had nightmares that Abdillahi would kill her.
Defending Abdillahi, Ross Johnson said the defendant had a history of self-harming and depression and had been diagnosed with a borderline personality disorder.
Abdillahi had entered Britain in 1999 on a false passport and after spending five years in Cardiff, moved to London in 2004.
The Daily Mail reported that Abdillahi – who was bullied in his homeland for being effeminate – killed the widow after he stopped taking his medication and turning instead to cannabis and khat — leaves of a wild East African shrub called Catha edulis, which contains two mild stimulants, cathinone and cathine.