This week marks the one-year anniversary of the tragedy of Cikeusik in Banten, when members of the Cikeusik Muslim Movement killed three members of the Muslim-minority sect Ahmadiyah. Since then, Indonesian human rights organizations have launched a conversation about the place of religious tolerance in society.

Unfortunately, this conversation is rife with uncertainty. The origins of intolerance to ward Ahmadiyah, the attitudes of the civil society organizations Nahdlatul Ulama (NU) and Muhammadiyah toward Ahmadiyah, and the state policies toward Ahmadiyah are poorly understood. This ambiguity makes it difficult to pinpoint the cause of the violence, let alone try and stop the violence.

In explaining the origins of contemporary intolerance toward Ahmadiyah, most commentators point to 2005, when the Indonesian Ulema Council (MUI) reissued their fatwa (edict) declaring Ahm...