london repressive state blame breed terrorism britain foreign minister boris johnson say thursday speech defend western foreign policy denounce islamist extremism britain suffer four deadly attack london manchester march june year kill 36 people wednesday man appear court accuse plot kill british prime minister theresa may speak diplomats experts foreign office london johnson call good engagement muslim populations worldwide argue blame western intervention rise islamist extremism play jihadi narrative accord brief note issue foreign office assert people often terrorism see streets britain america kind punishment adventurism folly middle east ignore so-called punishments visit people swedes belgians finns japanese hostages murder daesh history region say accord advance extract speech say islamist jihadism addictive power crack cocaine extremism stem repressive state western policy say uk 's johnson