Résumé : It is a known fact that some Belgians collaborated with the Nazi occupier during WWII. However, according to a popular myth, collaboration was widespread in Flanders, whereas Walloons bravely resisted. Of course, historical reality is much more nuanced, but this oversimplification has largely resurfaced in political debates surrounding the Belgian linguistic conflict. Demands for amnesty for former collaborators addressed by Flemish nationalist parties are a case in point. We conducted two studies in order to investigate Belgians’ attitudes towards this political issue in the two linguistic communities. In 2012, a first survey (N = 521; 315 French-speakers (FS) and 206 Dutch-speakers (DS)) showed that WWII collaboration was morally condemned, and attitudes towards amnesty were predominantly negative, in both groups. However, DS tended to support amnesty more than FS. This effect of Linguistic Group on Support for Amnesty was mediated by Judgments of Morality of collaboration, and this mediation was moderated by Linguistic identification. In 2015, a second survey (N = 774; 476 FS and 298 DS) confirmed these results. Moreover, judgments about the Unfairness of the repression of collaboration also mediated the effect of Linguistic Group on Support for Amnesty. These results suggest that differences in political position-taking regarding the granting of amnesty between DS and FS are, at least partly, due to different attitudes towards collaboration and to the membership to a linguistic community.