Final answer:
The lyrics may discuss opposition to Roman Catholics and hostility to immigrants.
Explanation:
The lyrics discussing 'Uncle Sam's Youngest Son: Citizen Know-Nothing' likely revolve around the topics of:
- Opposition to Roman Catholics: The lyrics may include sentiments against Catholic immigrants due to nativist tendencies within the Know-Nothing party.
- Hostility to immigrants: The lyrics might express negative attitudes towards immigrants, especially Catholic immigrants, as seen in the historical context of the Know-Nothing Party.
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