What is the only country in insular southeast asia that has a largely christian population?

The Philippines is the only country in southeast asia that has a largely christian country. Freedom of religion and the separation of church and state is guaranteed by the constitution. In an effort to reduce tensions between Christians and Muslims in the southern islands and to answer Muslim autonomist demands, the government established an Office of Muslim Affairs in 1981 and allocated funds for Islamic legal training and for Muslim schools and cultural centers. Part of its role, as of 1999, involved coordinating the travel of pilgrims to Mecca, Saudi Arabia, and coordinating diplomatic ties with countries that have contributed to Mindanao's economic development and to the "peace process" with insurgent groups. The National Ecumenical Consultative Committee is a government-sponsored group that encourages interfaith dialogue. Certain Christian holidays are recognized as national holidays.