Final answer:
Thomas Jefferson was the founding father who supported the French cause throughout the French Revolution, seeing the overthrowing of French aristocracy as part of a greater fight for human liberty.
Step-by-step explanation:
The founding father who supported the French cause during the tumultuous period of the French Revolution was Thomas Jefferson. While many Federalists, including Alexander Hamilton, questioned the extent of liberty and equality being exercised during the revolution, viewing the Reign of Terror and mass executions as a descent into anarchy, Thomas Jefferson and his ally James Madison believed the violence and the fate of France's nobility served a 'greater cause' of human liberty. They, along with other Republicans, viewed the French people's struggle as a reflection of a righteous fight against monarchism and aristocratic privilege, much in the same spirit as the American Revolution. This ideational split further deepened the political divide between Federalists and Democratic-Republicans in the United States.