If the French Terror had a slogan, it was that attributed to the great orator Louis de Saint-Just: “No liberty for the enemies of liberty.” Saint-Just’s pithy phrase (like President Bush’s variant, “We must not let foreign enemies use the forums of liberty to destroy liberty itself”) could serve as the very antithesis of the Western liberal tradition.
On this principle, the Terror demonized its political opponents, imprisoned suspected enemies without trial and eventually sent thousands to the guillotine. All of these actions emerged from the Jacobin worldview that the enemies of liberty deserved no rights.
Though it has been a topic of much attention in recent years, the origin of the term “terrorist” has gone largely unnoticed by politicians and pundits alike. The word was an invention of the French Revolution, and it referred not to those who hate freedom, nor to non-state actors, nor of course to “Islamofascism.”
A terroriste was, in its original meaning, a Jacobin leader who ruled France during la Terreur.
Bush’s Dangerous Liaisons (François Furstenberg in the New York Times)
Terrorism (Online Etymology Dictionary)