Exaggerated: The Assassins have been covertly aiding absolutely everyone who fights any sort of Ancient Conspiracy, from the foes of The Knights Templar to the foes of The Grey to the foes of Microsoft.
Downplayed: The Assassins have been just aiding the Communist revolutionaries and the American revolutionaries.
Justified: Both the Assassins and The Knights Templar possess powerful artifact from The Precursors, so only the Assassins can ever hope to challenge The Knights Templar.
Defied: President Evil, aware and well informed about the Assassins' agenda, forms a specialized squad to counter them, The Reapers.
Deconstructed: After existing for so long and encompassing so many people, Ancient Tradition is no longer unified but composed of many conflicting factions; the passive helpers, the active helpers, those that insist on traditional practices and those that want to create new practices to fit the age, and people that are born to it but don't want to be part of it.
Reconstructed: Though there are many factions within the Ancient Tradition they are unified by its core purpose of opposing the Knight Templars and proceed in thew ay they believe is best.
Played For Laughs: The Assassins protect the world from the secret of... the recipe for world's most delicious sushi. The World Is Not Ready.