Source : Sarawak Regions Census 2010.
Sarawak possesses a richly spiritual society formed from its multiracial and diversity of religions of its people. Christianity has the highest number of practitioners in Sarawak with 43%-majority according to the 2010 census. Major Christian denominations in Sarawak are the Roman Catholics, Anglicans, Methodists, Borneo Evangelical Mission (BEM or Sidang Injil Borneo, S.I.B.) and Baptists. Many Sarawakian Christians are non-Malay Bumiputera, ranging from Iban, Bidayuh, Orang Ulu and Melanau. Islam is the second largest religion in Sarawak with 30% of Sarawak population are Muslim. Many Muslims are from Malay, Melanau and Kedayan ethnic groups. Buddhism is the third largest, predominantly practiced by Chinese, with slightly less than 20% professing it.
Other significant religions in Sarawak are Baha'i, Hinduism, Sikhism and animism. Many Dayak especially Iban continue to practice traditional ceremonies, particularly with dual marriage rites and during the important harvest and ancestral festivals such as Gawai Dayak, Gawai Kenyalang and Gawai Antu. Other ethnics who still have trace number of animism followers are Melanau and Bidayuh.
source of : Census of Sarawak Religions year 2010
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Point 1: Religion
While there was no objection to Islam being the national religion of Malaysia there should be no State religion in Borneo (Sarawak & Sabah), and the provisions relating to Islam in the present Constitution of Malaya should not apply to Borneo
