I want to know the answer to the following question:
What caused a dramatic shift in Italian sentiment toward the war?
All the background I'm provided with is that "Bismarck's demand for the return of Alsace caused a dramatic shift in that sentiment in Italy, which was best exemplified by the reaction of Garibaldi soon after the revolution in Paris, who told the Movimento of Genoa on 7 September 1870 that "Yesterday I said to you: war to the death to Bonaparte.". Is that enough to answer the question?
Answer: yes