WSJ's Trofimov talks to some of the 2.5 million refugees and displaced people in the sectarian conflict in Iraq in 2015. He finds a mood of despair and resignation to a permanent partition of the country following sectarian conflict between Shiites and Sunnis. The situation is being dictated by the facts on the ground as the refugees see little prospect of returning to their homes, and the different regions controlled by Sunni, Shiite and Kurdish forces with borders.