Actually, Salvatore, what you're seeing is a highly accurate depiction of what happened in Havana following Batista's defection. Mobs of pro-Castro Habaneros trashed the casinos, believing them to be symbols of US Mafia-dominated imperialism. (The only casino that was spared was the Capri, where US gangster actor George Raft was the official "greeter." Raft stood at the doorway of the casino and faced down the mob--"over my dead body," he said. They backed off). The guy who fell down in the scene you cited was one of many attacking parking meters with baseball bats. That really happened. Batista promised that the revenues from parking meters would go to a children's hospital, but they went instead to the pockets of his brother in law.
FFC's fanatical attention to detail is one of the main reasons for the greatness of the GF films, and the Havana sequence is the supreme example of attention to detail. So authentic is his work that scholars of modern Cuba advise their students to watch GF II to get a good picture of what Havana was like on the eve of Castro's takeover.