This research examines how social trust translates into dynamics of mobilisation for inclusion or exclusion in Swiss cantons by studying how social trust is linked to equality-directed protest intention versus radical right support, comparing individual-level and contextual-level relationships. The study is based on data from the Swiss Household Panel collected between 2002 and 2008. The impact of individual-level and contextual-level social trust is analysed in three-level regression models of repeated observations, nested in individuals who are nested in cantons. The results indicate complex patterns that depend on the level at which social trust is assessed and confirm the need for a contextualised view of social trust and social capital. For individuals, higher social trust is associated with higher protest intention and lower radical right support. However, in cantons characterised by higher rates of social trust, individuals are less likely to engage in protest actions and more likely to support the radical right. Further analyses show that canton-level social trust is intertwined with other contextual factors, suggesting that in certain configurations, that is, combined with low levels of cultural and social diversity, climates of social trust may be linked to more restricted forms of solidarity and the persistence of inequality.