Do you refuse to comprehend the fact that that event, in and of itself, is catastrophically, apocalyptically evil? How about the sexism? The xenophobia? The lack of free speech and liberties? The destruction of a peaceful religious order? The enslavement of the Wookiees? The razing of Kashyyyk? The obliteration of Despayre? The relentless killing of their own officers? Tarkin says it himself; "Fear will keep the local systems in line". Not democracy. Fear. Hey, kids, don't make jokes about the Emperor, or you'll have a huge planet busting space station landing on your doorstep. And then atomizing it. Before the Death Star? Torture, slavery, xenophobia were all a huge part of Sith regimes. They couldn't give a damn about the people they were in charge of, as long as they were in charge. They didn't care who they had to kill to get to the top, as long as they got to the top. Inherently evil acts, all of them.