`!-- Début du contenu @xml:lang="en" --b‪This article sheds light on the trajectories of some French people who have converted to Salafism but whose parents are no Muslims. Mixing a subjectivist as well as more deterministic approach, this contribution highlights how some actors interpret their evolutions, as well as the social logics influencing their choices. Even though the converts explain their choices as the result of a spiritual vocation, the article does also show the importance of and the role of a preexisting local sociability. This conversion “by osmosis” (Mayer, 2011) and “by friction” (De Singly, 2000) reflects a type of religious commitment in which their uncompromising ethics is fed with discourses and representations that we can frequently observe beyond the Salafist youth. Living in some relegated territories, i.e. the outlying suburban ethnicized and racialized areas, does feed a relationship with the society made of antagonism. Conversions to Salafism echoes to how Islam is used by some people to redefine a situation of social marginalization in their favor at the detriment now of the rest of the society.‪`!-- Fin du contenu @xml:lang="en" --b