 Nick O'Brien, associate professor of counter terrorism at Charles Sturt University has said Islamic State's magazine claim that the Sydney siege gunman is a righteous jihadist should not be lightly dismissed.Dr David Martin Jones, Senior Lecturer at the School of Government, University of Tasmania has said not to underestimate the politically destabilising intent of Monis's lone-actor violence, as it is a considered tactic and a strategic goal of ISIL.On 2 October 2015, an Iranian-born Iraqi-Kurdish youth shot dead a 58-year-old accountant, who worked for the New South Wales Police Force, outside the Parramatta Police headquarters.