Why does marullus get annoyed with the cobbler?

Marullus gets annoyed with the cobbler because he feels that the cobbler and other commoners are being hypocritical in their celebrations of Caesar's victory over Pompey, despite having previously favored Pompey. He is frustrated by their fickle loyalty and lack of understanding of the political situation. Marullus believes the cobbler's lighthearted attitude towards such serious matters shows a lack of respect for the gravity of the situation. This irritation reflects Marullus's disdain for the common people's inability to grasp the implications of their changing loyalties.