What is the main conflict in 2002 Arab and Jew: Wounded Spirits in a Promised Land by David K. Shipler?

2002 Arab and Jew: Wounded Spirits in a Promised Land, a work of non-fiction drawn from the author's five years of service as the New York Times bureau chief in Jerusalem, was originally published in 1986. He wrote it as a trained, neutral, but concerned observer, motivated by a combination of sorrow and outrage - repulsed by the zealous intolerance of both sides, but mostly sympathetic to the personal lives of everyday people affected by the violence.