This paper is an empirical analysis of the different signs of social conflict and Islamist radicalization within a Muslim community in a middle-class Spanish city. This analysis has been twofold: first, of the content of Friday sermons and, second, an ecological study of mosques. Our investigation has been based on an observational methodology. The tool used has been a system of register and codification tables whose validity can be verified. The provisional results point at the fact that there is no induction either to radicalization or violence in Friday sermons, or to conflict with the receiving community. Nevertheless, we have noticed certain blinkered attitudes toward values and rules of the receiving society which, in the long-term, could lead to the creation of a parallel society.