People should be much more afraid of dying in a car accident than dying at the hands of terrorists, yet few people are urgently pushing the government to enforce stronger safety standards in cars / on roads. Instead people demand better security to protect them against things they are unlikely to be involved in to begin with.

Compared with traffic regulation and enforcement, the response to terrorist events like this are vastly out of proportion, and well into the range of irrational response that the terrorists know is the only way to really damage a large powerful nation - by making it turn on its own people and put them in a security-state panopticon.