Luke and Anakin's actions are NOT comparable because Luke had no choice while Anakin had plenty of choices. The stormtroopers are guilty by association because they serve Darth Vader and they followed his commands. Plus, the stormtroopers did nothing to Luke???? They've killed Owen and Beru, chased Luke off of Tatooine, and were shooting at him ever since he came onboard the Death Star so he had every right to shoot back at them. His life is already at risk from the start and even when Luke was upset over Obi-wan's death, he didn't attack the stormtroopers until they fired the first shot. You can't fault Luke for just standing there because he wanted revenge for everything that has happened to him. Sure, the stormtroopers had nothing to do with Vader killing Obi-wan but that didn't stop them from wanting to gun down Luke, Leia, and Han. Another thing, saying that the stormtroopers were doing their jobs is insulting because its like saying Osama Bin Laden was doing his job when he asked his followers to hijack some planes so they can crash them into both the World Trade Center and the Pentagon on September 11, 2001. If someone shoots at me, I'm not going to let them make a direct hit because I'm going to shoot them before they kill me. As for the Tuskens, despite what they've done to Shmi, Cliegg Lars, and the rescuers that tried to save her, they were no threat to Anakin. What I mean is he has the power to demolish buildings and break bones with his mind but he knows that a Jedi never abuses his/her powers like that. 1 Jedi alone can eliminate 50 bad guys either by waving their hand or slicing them up with their lightsaber. The Jedi are similar to the gods of Mt. Olympus who can wipe out the human race just by snapping their fingers but they chose not to because they need the humans to gain their strength. Plus, Anakin said it himself that a Jedi never attacks an unarmed prisoner and the Tuskens were unarmed and defenseless until they saw him decapitate their fellow Tuskens. As upset as he was over his mother's death, Anakin could've chosen not to walk out that tent and murder those sandpeople because he snuck into their village without being seen so he could've taken Shmi's body out the same way. There was nothing to stand in his way of getting back to the Lars homestead and no point to killing the women and children but he massacred them all anyway. Anakin could've stopped himself at anytime but he didn't while Luke's only options are to stay alive and get off the Death Star.