I come home to London from WCTR to car bombs and people driving into airports (shall we now inspect all cars driving into airports ... and then the security line becomes the target, secure areas always have insecure areas outside boundaries and entrances).
Fortunately, this particular cell were not a particularly competent terrorists, so I will refer to them as goofballs. I have yet to see whether they were competent doctors? One hopes the goofballs healed better than they attempted to inflict harm.
Later in the week, a train derails:
Metronet warned in May over derailment danger. A number of passengers had panic attacks, thinking it was another terrorist attack, coming almost 2 years after 7.7 and days after the Piccadilly smoking car.
The greater harm done by terrorists (even the goofballs) is not the physical damage, but the terror (which gives this -ism its name), and people living in terror. This culture of fear is amplified by news and free flow of information.
The book Paradox of Choice by Barry Schwartz talks about the curse of abundance, we have too many options and by extension too much information. This repudiates the economists argument of "non-satiation", required for well-behaved utility functions.
Of course many bad things happen in the world, but when personal tragedy strikes people I don't know, and will never know, do I really need to know and am I better off if I know?
Cars hurtling on fire toward airport entrances and dud-car bombs might rise to be slightly larger than personal tragedy, but not too much larger. Scarcity makes events like this unusual, and therefore newsworthy, but unlike "dog bites man" wherein the dog was after the man rather than the news-story, getting attention from the news and causing fear is exactly the terrorist aim.
The appropriate response would be to note it, arrest the goofballs, and move-on, rather than obsessing and changing our ways and continuously reminding ourselves of the goofball agenda, and thereby empowering it. Attention is the ransom demanded by terrorists, and we don't pay ransom for fear of encouraging kidnapping, we should not pay attention for fear of encouraging more random acts of terrorism.