Islamist Extremism Islamic State Islamic Extremism Public Safety Case of Samuel Paty Knife Attacks Attacks Assassination Islamism Islamist Terrorism Online Extremism Knife Attack Messerangriff Asylum Seekers Public Response Antisemitism Prevent Programme Victims Samuel Paty Case Youth Involvement Individual Cases Islamophobia Individual Extremism Daesh Investigations Shamsud-Din Jabbar Lone Wolf Attacks