Richard Barrett, ex-SIS, has a short article today that fits here; the actual title being 'The best defence against terrorism is to show that it does not work as a way of changing government policy or public perception'. A key passage:
There are two strands to making terrorism less attractive. The first is to encourage public resilience to terrorism; the second is to ensure a proportionate response.
Link: http://www.telegraph.co.uk/news/2016...-it-does--not/