The fact that someone was misguided does not absolve them of wrongdoing or provide a shield against criticism. That seems to have been the theme of the Prequel Trilogy -- everyone was misguided, they ended up killing billions of people, and it took Anakin twenty years to redeem himself of his mistakes. Mistakes born of trying to do what he thought was right.
Fortunately, if this DVD release is any good, George has patched things up in ten. So he's not quite as evil as Darth Vader.