In the pre-Fascist period, the Italian political parties had guaranteed, via a resolution in parliament, the right of the various national minorities to cultivate their own language, culture and religion. With the advent of the first Fascist government, all this changed, since the very existence of national minorities was incompatible with Fascist doctrine. The Fascist policy of denationalisation was based on the denial of the existence of other nationalities within the borders of Italy, which in any case had been artificially created by the former foreign rulers of the territory. The Fascists thus used legal means to erase the outward appearance of the existence of a national minority. The leaders of the minority – members of the middle classes and the intelligentsia – were dispersed. The only exception was the clergy, which from then on appeared to be the only serious obstacle to assimilation. Beginning in 1931, a policy of colonisation was put into practice, with the aim of completing the process of Italianisation. The Fascists exploited the poverty of the Slav peasants and drove them to destitution.
Fascist Italy implemented its policy of denationalisation through the press, schools, social institutions, trade unions and political organisations.