This study examines how far-right candidates in the 2025 Polish presidential election construct and reinforce symbolic boundaries of their social world across four issue domains: nativism and religion, the Russo-Ukrainian war, immigration, and populist anti-elitism. The empirical material comprises long-form interviews (mostly 2–4 h) published on the popular YouTube channel Kanał ZERO. The analysis combines the social worlds perspective with the concept of symbolic boundaries to trace how moral, cultural, and political lines of inclusion/exclusion are produced. Findings show a recurrent boundary logic: (1) cultural-religious authenticity versus foreign ideology, (2) national sovereignty versus foreign domination, (3) civilized Poland versus dangerous outsiders, and (4) the people versus corrupt elites. These moves enact a politics of non-encounter that converts superdiversity’s complexity into moral simplification and social closure. The article contributes an integrated framework linking world-making and boundary-making and demonstrates how far-right discourse stabilizes a self-contained social world. It concludes by discussing implications for intercultural communication and public resilience to exclusionary narratives.