Yes it is a trustworthy source
Answer:
Though Mussolini made more than one address, I will write about the one during October 1935.
Benito Mussolini's 1935 radio address influenced much of Rome at the time. Thousands of people tuned in to listen to the (then) leader of Italy's speech. The announcement addressed "fascism". Fascism is a type of rule, mainly categorized by dictatorial rule. Mussolini addressed both his agenda and plans for the country within the hour long speech and made sure to convey that his interests were in protecting his country and strengthening it against enemies. Many Italians found Mussolini's speech both moving and powerful which means that it can be considered as a type of propaganda.
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This shows that they were very clever to make a stone wall. This makes trying to bring down the wall harder most likely make enemy think not to attack them.