It makes sense to me that people in the Rebellion, who want to restore the Republic, would not believe the 'history' spread by the Empire. It would be weird to me if the Rebels<em>did</em>think the Jedi were conquerors and would-be assassins. They'd almost certainly believe that Palpatine was lying about the attack, in order to seize power and remove the Jedi, who he feared would oppose him. That's not to say that everyone who works with them would agree (see Han Solo in the first movie), but hardcore supporters believing good things about the Jedi makes sense. Remember how they used "May the Force be with you," in the films.<br/><br/>As for the Sith, it does seem kind of weird to me that nobody knows about the conflicts the Republic had with them millennia ago, considering how dramatic they were. At the very least, I'd expect that historians would know who they are. Now, this was a problem with the EU, not really the movies, but it extends into what we've got here.<br/><br/>Discussing Sith as recent events would be odd, and knowing that Vader and the Emperor were Sith would be a bit much, but a historian discussing several-thousand year old events that involved them doesn't seem wildly out of place to me, even if it might cause some eye-rolling among her audience. Kind of like explaining that some people are descended from the ancient Spartans, and have thus remained militarily inclined and fascistic for thousands of years.