You know, he never would have had to blow up Alderaan if the rebels weren't around in the first place. Also, planets like Endor , Hoth, and Cloud city wouldn't have been attacked, Uncle Owen and Aunt Beru wouldn't be dead, lives wouldn't have been threatened, and a lot of bad stuff wouldn't have happened without the rebels. So answer me this: was it the Empire's fault that Alderaan was destroyed, or the Rebellion?
