The Bahá'à Faith, as a modern religious movement that emerged in the 19th century, is characterized by universalist, transnational, and pacifist ideals. These teachings conflict with the traditional structures of nationalism, which are grounded in national identity, territorial integrity, and cultural unity. This paper, through a document-based and comparative analysis of Bahá'à texts, examines the ideological principles of the Bahá'à Faith in comparison with the core elements of nationalism. The findings reveal that the Bahá'à emphasis on the "unity of humankind," the negation of national borders, and the promotion of a global government, are fundamentally at odds with the modern nationalist discourse.