This paper provides one model of research on “Anthropology of Religion”, especially related to the integration of internal conflict and religious communities that have been well demonstrated in the book: “Conflict and Integration: Different thought of Islam” by Achmad Fedyani. Fedyani find that there are five factors of religions internal conflict between the NU and Muhammadiyah, namely: problem talafuz bi al-niyyat, talqīn problems, asyrakal problems, and problems “maaruwah”. On the other side, it was found that the damping factor is the complexity of conflict and modernization; three developments of national culture, changes in the organization, awareness of the unity of traditional culture and the mixed communities.