This study investigates the shifting landscape of religious understanding within the domestic sphere by examining the dynamics of intra-faith conflict management in urban Muslim families with multi-organizational backgrounds and its subsequent impact on children's religious education. Operating within a qualitative phenomenological case study framework, this research purposively selects and analyzes urban households where parents maintain active, distinct affiliations with different major Islamic mass organizations in Indonesia, such as Nahdlatul Ulama and Muhammadiyah. Data were systematically gathered through semi-structured in-depth interviews with parents and children, domestic participant observations, and documentary analysis, and were processed using the interactive model of qualitative data analysis. The findings reveal that domestic religious friction primarily stems from differing organizational orientations regarding furu'iyah (non-fundamental) ritual practices and socio-political views rather than fundamental theological tenets. To preserve marital harmony and ensure family resilience, couples successfully develop collaborative coping mechanisms and adaptive communication models that operationalize the principles of tasamuh (tolerance) and family maslahah (collective welfare). Over time, this continuous domestic negotiation facilitates a profound intellectual transformation among spouses, shifting their religious outlook from exclusive-organizational rigidity to an inclusive-substantive understanding of Islam. Consequently, this domestic pluralism acts as a strategic incubator for children's psychospiritual development, reducing initial cognitive dissonance and ultimately fostering high levels of adaptability and a robust foundation in wasathiyah (Islamic moderation). These insights suggest that contemporary Muslim families must prioritize substantive ethical virtues over formal organizational labels to cultivate a tolerant, progressive, and resilient future generation.