The latest worrisome incident occurred just this weekend. For years, a remote Muslim settlement in the Catskills, known as Islamberg, has been the subject of unfounded rumors fanned by the right wing that the village of a few dozen families is a terrorist training camp. State and local police have openly refuted these allegations and asserted that the village, founded in 1980 by African-American Muslims seeking to escape crime and crowding in New York City, is peaceful and cooperative with authorities.