The 1965 attempted coup, which resulted in hundreds of thousands of deaths, has long been blamed on the still-banned Indonesian Communist Party, historically supported by China, and this further strengthened anti-Chinese sentiment. Many Chinese converted to Islam in order to better blend in. When and what methods did Islam come to Indonesia? Were the original religions treated similar to how Christians were treated in the conquests of Roman Empires in the 700's? history conversion Share Improve this question Follow edited Jan 3, 2021 at 12:49 goldPseudo ♦ 12.3k 16 57 129 asked Dec 30, 2020 at 3:52 Peter Turner 163 8 2 If numbers can tell a story, the conversion to Islam of the peoples of the Indo-nesian archipelago can be counted as a great success. Even if the official statis-tics claiming that 90% of Indonesians today are Muslim are somewhat exag-gerated or ill defined, it is clear that Islam has taken strong root in the region Ricklefs (1991) identifies two overlapping processes by which the Islamisation of Indonesia occurred: (1) Indonesians came into contact with Islam and converted, and (2) foreign Muslim Asians (Indians, Chinese, Arabs, etc.) settled in Indonesia and mixed with local communities. WnCu.