AbstractSri Lanka's postindependence history suggests that continuous efforts by the Sinhala‐Buddhist politicians to reject decentralization created anxiety and distrust among minorities. The state used both Sinhala language and Buddhism to accommodate Sinhala‐Buddhist interests and provide cultural security to Sinhala‐Buddhists who feared that the Sinhala race, Buddhism, and heritage would be threatened with destruction by the Tamil and Muslim separatists and extremists. The state forced the Liberation Tigers of Tamil Eelam (LTTE), which demanded a separate state for North and Eastern Tamils, to silence its guns in May 2009. The military defeat of the LTTE did not produce any democratization of the island. Sinhala‐Buddhist extremist forces turned their eyes on Sri Lankan Muslims, whose elites attached to major political parties supported the war against the LTTE. This study examines the politicization of the Sinhala language and Buddhism in Sri Lanka before and after the civil war between the LTTE and the state dominated by the Sinhala‐Buddhists. It argues that Sinhala political elites willingly took measures to centralize power. The major result of centralization is the birth of the state‐seeking, but authoritarian LTTE. It will also provide some useful analysis to examine post‐war tensions between the Muslims and the Sinhala‐Buddhist extremists. Finally, I discuss some solutions to fight the rising authoritarianism to help Sri Lanka enjoy the fruits of modernization and democracy.