This article contributes to the debate over the appropriate place of religion in public reason by showing the limits of this framework for understanding and evaluating the real-world religious political activism of social movements. Using the 1980s Sanctuary Movement as a central case study, I show how public reason fails to appreciate the complex religious dynamics of this movement, the reasons actors employ religious reasoning, and, as a result, the very meaning of these acts. In response, I argue that a Deweyan perspective on the tasks and challenges of the democratic public offers a richer, more contextualized approach to evaluating the status of religion in the public sphere as well as other emerging publics whose modes of engagement defy prevailing notions of reasonableness and civility.