In recent times, religious nationalism has emerged as a major basis for identity and mobilization. In Asia, religious nationalism specifically challenges existing pluralist approaches to constitutional government, which have generally been seen as necessary to ensure peaceful coexistence. The increasing alignment of religious and national boundaries has the worrying capacity to neutralize the “cross-cutting cleavages” that could otherwise vitiate the centrifugal tendencies of pluralistic societies. In the context of pluralistic Asia, therefore, religious nationalism is fundamentally anchored in a rejection of ethnic, religious, cultural, and even legal plurality. This has serious consequences for the freedoms of religious groups, particularly minority groups and minorities within dominant religious groups. This article introduces the Special Issue studying not only the phenomenon of religious nationalism in Asia, but also its impact on the rights of religious groups and their religious freedoms, broadly conceived.