the origin of "terrorist"

Head over to the New York Times and read François Furstenberg's essay on the original terrorists:

He warned his political opponents, “This severity is alarming only for the conspirators, only for the enemies of liberty.” Such measures, then as now, were undertaken to protect the nation — indeed, to protect liberty itself.

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.

Excellent.