This article will attempt to ‘provincialize’ or ‘decentre’ critical theory by looking at the development of critical discourses from within the Islamic and Sikh religious traditions. Although important theological, philosophical and historical differences exist between the two communities, Islamic and Sikh narratives share a rejection of the subordination of the religious to the political and thus potentially challenge the Westphalian order. However, in the case of the Sikh Qaum, no clear distinction between ‘nation’ and ‘religion’ is possible given the strong attachment to a territorially defined ancestral homeland. This article suggests that both critical Islamic and Sikh discourses, particularly those emanating from the diaspora, are potentially compatible with the ‘discourse ethics’ of critical theory. This is, however, conditional on the recognition of the universality of their beliefs, a position incompatible with the ‘thin’ cosmopolitanism of critical theory.