A radical Islamic Web site systematically tracks Christians on PalTalk.com, an Internet chat service on which a New Jersey man received a death threat two months before he and his family were murdered. The password protected Arabic Web site, at the address www.barsomyat.com, features pictures and information about Christians who have been particularly active in debating Muslims on PalTalk.One page from barsomyat.com features a group of photographs of a Syrian Christian, "Joseph," who now lives in Canada. Barsomyat.com's users have posted personal information about Joseph, including his brother's parole status, and make clear that they are actively trying to track...