On a cold November day in Amsterdam, an angry young Muslim man, the son of Moroccan immigrants, killed celebrated and controversial Dutch filmmaker Theo van Gogh, great-grandnephew of Vincent and iconic European provocateur, for making a movie that "blasphemed" Islam. The murder horrified quiet, complacent, prosperous Holland, a country that prides itself on being a bastion of tolerance, and sent shock waves across Europe and around the world. Ian...