Women protesters holding posters of Nabeel Rajab and Ibrahim Sharif demand their release during an anti-government march organised by al-Wefaq opposition party in Budaiya, west of Manama, in this August 31, 2012 file photo. Opposition to Gulf Arab governments comes from a variety of groups -- disgruntled Shi'ite Muslims alleging discrimination in many walks of life, Sunni Muslim unemployed youth demanding jobs, human rights and anti-corruption campaigners, liberals seeking a more open society and more accountable government and Islamists calling for stricter adherence to religion. To match Feature GULF-RIGHTS/ REUTERS/Hamad I Mohammed/Files (BAHRAIN - Tags: CIVIL UNREST POLITICS SOCIETY)