Ethnogenesis and ethnomysticism together name the process by which a group’s ethnic identity gets treated as sacred, fixed destiny rather than as history. Ethnogenesis is the anthropological term for how ethnic groups form and cohere over time, through shared migration, kinship, language and origin stories that give a population a felt continuity across generations — scholarship traces the concept back to work by Herwig Wolfram and Reinhard Wenskus on how such identities are built, not simply inherited. Ethnomysticism names what happens when that identity is elevated further: ethnicity becomes a metaphysical fact, a mystical bond prior to and independent of politics, used to legitimate claims to territory or power. Together these form deep ideologies which suggest we are bound by our ethnic identity, and therefore entitled to certain powers, places or resources. Researchers studying the related idea of national mysticism describe how nations are raised to the status of near-divine truths through pseudohistorical claims of antiquity, so that defending land or power feels spiritually imperative rather than merely political. The same pattern of sacralized ancestry has been identified as a root of Zionism, ethno-nationalism, and white supremacy alike — each converting a contingent, constructed lineage into an unquestionable inheritance.
Also see Dominion Theology and Terror Management