There are right ways to make your villains sympathetic, and wrong ways.
Turning your PCs against one another so they start wanting to work with their enemies is...
Actually, that could be kind of fun.
R2-D2: It comes to this.
R2-D2: Abandoned again.
R2-D2: Right when a nice big land war is starting.
R2-D2: Guess I'll go back to the ship and get into the action.
R2-D2: Through the droid factory.
R2-D2: Which was totally doable, by the way.
Boba Fett: Goodbye, adopted father.
Boba Fett: First my real father, then my mother, and now you.
Boba Fett: The people responsible for this will pay...
R2-D2: Want some help?