Do they? AC has been as historically accurate as a drunken stormtrooper for the most part with its forced in assassins vs templar conflicts
Not that I disagree about accuracy being important tho.
I think anyone who's somewhat knowledgeable of history and has played an AC game or two knows that they're not very accurate, true. However, Ubisoft does like to harp on about how much research they do (granted, usually when it comes to building historical cities, not characters, but still) and they do like to trot out their in-house historians for their marketing campaigns so I guess the answer is "yes and no" .