Final answer:
Marullus in his speech skillfully uses ethos, pathos, and logos to criticize the public's changed loyalty towards Caesar, highlighting the fickleness of their celebrations.
Step-by-step explanation:
The main point of Marullus's speech is to criticize the common people for their fickleness in celebrating Caesar, whom they once despised. He employs various rhetorical devices such as ethos, pathos, and logos to persuade his audience. Ethos is seen in Marullus establishing his credibility by pointing out the inconsistency in people's actions. Pathos is present as he appeals to their emotions by contrasting Caesar's triumph with Pompey's downfall. He uses logos in arguing that celebrating Caesar's victory dishonors Rome's own values and history. Examples from historical Roman figures like Cicero and analogies drawn from Roman practices are indicative of these classical rhetorical techniques.