Secularism is protected by the constitution of Bangladesh and religious parties are barred from contesting elections; however, the government is accused of courting religious extremist groups. Islam's ambiguous position as the ''de facto'' state religion has been criticised by the United Nations. Despite relative harmony, religious minorities have faced occasional persecution. The Hindu and Buddhist communities have experienced religious violence from Islamic groups – notably the Bangladesh Jamaat-e-Islami and its student wing (Shibir). However, Islamic groups are losing popular support - Islamic far-right candidates peaked at 12 percent of the vote in 2001, falling to four percent in 2008.