Blogs dedicated to protecting America against terrorism are troubling the Muslim community. Kaufman's site is only one of a constellation of blogs with names like JihadWatch.com, MilitantIslamMonitor.org, and WesternResistance.com that are dedicated to the surveillance of American Muslims. The blogs link to one another, with more-traveled sites amplifying stories from more obscure ones, like Kaufman's. Last month, after Kaufman called a Tampa Muslim religious retreat a "jihad camp for children" and wrote that the speakers were "linked to al-Qaida," death threats poured in to the Presbyterian camp hosting the event. Muslims say the blogs breed hate. "He's spreading lies, slandering...