The correct answer to this open question is the following.
Many people supported Benito Mussolini because they saw in him the kind of strong leader that Italy needed to overcome the difficult economic and political moments after the Depression. Mussolini used his charisma and personality to convince Italians that he was the one that would take Italy to progress and peace. He also knew how to treat the members of the Fascist party and that gained their support. The same happened with the king, the nobles, the businessmen, and the Church.