Act I Scene 11. What causes Flavius and Marullus to be upset with the citizens of Rome?

In Act I, Scene 1 of Shakespeare's "Julius Caesar", Flavius and Marullus, two Roman tribunes, are upset with the citizens of Rome for a couple of reasons:

1. Celebration of Caesar's Victory: The citizens are celebrating Julius Caesar's victory over Pompey, a former leader of Rome. Flavius and Marullus are supporters of Pompey, so they are upset that the citizens are so quickly and easily celebrating his defeat.

2. Fear of Caesar's Ambition: They are also upset because they fear that Caesar's ambition will lead to the downfall of the Roman Republic. They believe that the citizens' support is encouraging Caesar's ambition.

3. Lack of Loyalty: They are upset with the citizens' fickle nature, as they have quickly shifted their loyalty from Pompey to Caesar. They chastise the citizens for forgetting Pompey's contributions to Rome and for not mourning his loss.

4. Disrespect for their Authority: As tribunes, Flavius and Marullus are supposed to represent the interests of the common people. However, they feel that the citizens are disrespecting their authority by ignoring their warnings about Caesar.

So, in summary, Flavius and Marullus are upset with the citizens of Rome because they are celebrating Caesar's victory, encouraging his ambition, showing a lack of loyalty to Pompey, and disrespecting their authority.