Wasn't Jabba justified in kidnapping Han, given that Han dumped a shipment he was carrying for Jabba and never paid him back? Shouldn't Luke and Leia have asked the Alliance to pay Han's debt rather than destroy his entire operation? Did Luke feel justified in killing an untold number of people (albeit arguably morally dubious people) when blowing up Jabba's barge?
While I understand Jabba was a crime boss, and dealt in various contraband, was it really Luke's responsibility to destroy Jabba's operation? There was no indication that the plan was to take down Jabba, and that they were only interested in saving Han.