In this scene we see that the commoners of Rome are out for blood. They have been roused into a passion by Antony's emotional speech in the previous scene and are now completely set against the conspirators who killed Caesar. They are acting as an unthinking, baying mob and they set upon the poet Cinna, who is entirely innocent of Caesar's murder, simply because he happens to have the same name as one of the conspirators. Cinna protests that he had no part in Caesar's murder but they kill him anyway. This shows that the common people of Rome are very easily swayed by their emotions and can become dangerous as a result.