Your statement that the UK and France had a longer democratic history is patently false. France was an absolute monarchy until the French Revolution in 1789 (which was a major splitting point between the Adams, Jefferson, and Hamilton factions of the early United States), and the UK had a very limited form of franchise compared to the US until the Reform Act was passed in 1832, and even then it was still lacking due to the undue power of unelected, monarchy chosen House of Lords (though the US Senate as well didn’t have elections, but Senators were directly chosen by democratically elected governors)