This statement is so naive that it blows me away. As toomuchtodo said, there's a huge difference between n car accidents per year, and the equivalent damage done by a terrorist attack, and the answer isn't just "stop making such a big deal about it". When I get into a car, I'm putting myself in a situation that could be dangerous, and am accepting those risks for the reward of not having to walk to work. When these people sat down to have a drink, watch a soccer game, or enjoy a concert, they were doing so with the implicit safety that those venues and events provide. It's the difference between "expected" and "unexpected", and your answer can't just be "stop making such a big deal", because if we didn't make a big deal, the attacks would get bigger, broader, and more damaging until they got the reaction that they wanted. It's a complex problem with a lot of moving pieces, and this answer just takes away from that and presumes that there's a simple answer to a very hard problem.