In the month since the attack on the Manchester Arena on 22 May, commentators have offered a number of different motivations that could have led a Manchester-born-and-raised 22-year-old to massacre dozens of teenage girls and parents as they left a pop concert.
While there has been a lot of confident speculation by people who never met Salman Abedi, there is one person who has spoken up who definitely knew Abedi well, and who suggested quite a different kind of motivation for his…