Terrorism is created to scare people. Terrorist acts don't have to kill people, they just want to scare them a little bit. Have you ever been in a relationship where you were with someone and they were ignoring you and you say "well, so-and-so in the office finds me handsome/beautiful". Of course, you wouldn't run off with Emily or Armando from the office but you put a little thing on the mind of your significant other "hey, maybe I should pay more attention to my relationship..."
Multiply that by a few thousand and voila! Terrorism.
This article states that the media and the powers that be are playing right into the terrorists hands by using rampant fear-mongering for personal gain. It's not unlike politicians using the "tough on crime" talk to garner votes.
It's all bullshit. It doesn't deserve more of an explanation.