By differentiating radicalisation as a process from radicalism as a movement, this situated study examines the Spanish youth group Hogar Social's framework and core action through the analytical method of process-tracing. To contextualise their radicalisation process, it considers both the inspiration that it found in other similar European radicalised groups, in particular the neo-Nazi group Casa Pound in Italy, and the socio-economic and political context of its setting, through an account of the major events accompanying its formation. To explore their enacted strategies and goals, it investigates Hogar Social's most relevant narratives and performances since its emergence in 2014. An inquiry of their public statements and appearances focuses on both logics and reasons at the root of their radicalisation - and how they engage with their audience - vis-a-vis the radicalism that also exists in Spain. In such a light, this work contributes to understanding how oppositional interests of us versus them are used, and illustrates the role that prejudice plays in the radicalisation of youth. It thence allows to thoroughly ponder the double face of prejudice, whose consequences can be politically used as scapegoating moves to capitalise on people's unease in radicalisation processes.