From the very impressive site (and turn on your speakers):
The purpose of terrorism is to create victims. The goal is to murder and maim as many innocent people as possible. It is a political tool that has worldwide appeal, because it works. We have allowed it to work by not condemning and isolating those who use it. Terrorism has destroyed thousands of innocent lives in the past six years alone. Civilized people everywhere must condemn terrorism. We must speak in one voice. There is no excuse for terrorism - ever.
They represent a broad cross-section of humanity.
They are commuters on the London subway system. And on the trains in Madrid. They are celebrants at a wedding in Amman, Jordan and at a bat mitzvah in Hadera, Israel. They are little kids eating pizza; they are tourists in Bali and Egypt. They are people praying in churches and mosques and synagogues. They are celebrating the Passover Seder.
Even doctors who try to help can become victims. In September of 2003, Dr. David Applebaum, the head of the ER deparment at Shaare Zedek Medical Center was murdered along with his 20 year old daughter, Naava. They were in Café Hillel in Jerusalem.
(I wrote about this particular terror attack from a personal, painful POV here).