In the beginning of this scene, Brutus steps up on the podium to try and justify the murder of Cæsar by persuading the audience that they did the killing for the greater good of Rome. Antony then speaks and proves to the audience that Cæsar was a trustworthy leader and was one not to be misjudged. In Antonys speech, he uses sarcasm and repetition is a smart manner to attract the audience to his side.
React!