Apparently, the Cannes audience noticed similarities between Anakin Skywalker's fall to the dark side coupled with the cinematic rise of a warmongering emperor and President Bush's foreign policy approach.
Thirty years ago, Luke Starkiller's father was alive on Yavin and the Bogan Sith Lord Darth Vader was unrelated to Starkiller. The idea that (spoilers) Vader is Luke's father didn't develop until after ANH.