Final answer:
The question about Catiline's forgetfulness regarding Palestrina is not directly addressed in the provided excerpts, and thus there's no exact answer. The excerpts, however, focus on Cicero's descriptions of Catiline's moral corruption and his followers' decadence, reflecting the concerns about social decay in the Roman Republic.
Step-by-step explanation:
What Catiline forgot about Palestrina remains uncertain within the historical context of the questions provided, as there is no mention of Palestrina directly related to Catiline. However, what is emphasized is the character and the actions of Catiline, as depicted by Cicero. In Cicero's orations, Catiline is presented as a leader of a group of unsavory allies, characterized by their luxurious lifestyles, moral corruption, and readiness to engage in violence and treachery. Cicero condemns Catiline's followers for their abandonment of Roman values and for posing a significant threat to the stability of the Roman Republic. The Roman social and moral expectations, as well as the critique of the decay of societal norms, are a pervasive theme in the excerpts we have, which include Cicero's diatribes against Catiline and others who deviated from Roman tradition either in their personal conduct or political actions.