NABLUS, West Bank – It is hard for me to describe Ahmed Sanakreh as a terrorist, although I know it's true. Hard, because I got to know him and his family quite well, and when you understand people, it's hard to hate them: Twenty-year-old Ahmed, baby-faced with black hair sticking up in gelled spikes, and a passion for his Nokia 90 cell phone; and his elder brother, Alaa, the intense, hollow-cheeked leader of the Palestinian al-Aksa Martyrs Brigades in the Balata refugee camp in Nablus. They are the hard core of the hard core. Although Alaa was the leader, Ahmed...