Final answer:
Giolitti failed to work with the nationalists due to their differing political ideologies and goals.
Step-by-step explanation:
Giolitti, an Italian politician who served as Prime Minister multiple times in the early 20th century, failed to work with the nationalists due to their differing political ideologies and goals. Giolitti was a liberal who believed in parliamentary democracy and sought to modernize Italy through economic and social reforms. On the other hand, the nationalists were conservative and sought to promote Italian nationalism and strengthen the Italian state through aggressive foreign policies. Their divergent views and approaches made it difficult for Giolitti to align with the nationalists.