I dont think it's about stockholm I think it's about the psychological response called "stockholm syndrome".
Stockholm syndrome is a psychological response sometimes seen in an abducted hostage, in which the hostage shows signs of loyalty to the hostage-taker, regardless of the danger (or at least risk) in which they have been placed. The syndrome is named after the Norrmalmstorg robbery of Kreditbanken at Norrmalmstorg, Stockholm, Sweden, in which the bank robbers held bank employees hostage from August 23 to August 28 in 1973. In this case, the victims became emotionally attached to their victimizers, and even defended their captors after they were freed from their six-day ordeal. The term Stockholm Syndrome was coined by the criminologist and psychiatrist Nils Bejerot, who assisted the police during the robbery, and referred to the syndrome in a news broadcast.