A significant part of the crisis of our contemporary European societies can be attributed to misplaced and abused religious zeal in various forms of religious fundamentalism, both domestically grown as well as imported and shared by immigrants to Europe from Third World countries. To deal with this complex phenomenon in the European environment, it is necessary to conceive the analysis of the presented issue into a sociological scheme based on three premises: (1) diagnosis of migration processes in the context of growing population movements in Europe, (2) identification of determinants and factors that cause these movements, as well as (3) a proposal to solve the current situation in the spirit of the social teaching of the Roman Catholic ...