Honestly, if you wanted a thought out answer with some supporting "evidence" I don't have the time right now (I'm sneaking in at work). The use of clones is definitely one of those "troubling" issues but this is not the thread for that (see the thread in Prequels). So the short answer: Sids justified (to Anakin) what he was doing with an excuse that it was for the good of the galaxy but in actuality his goal was selfish. It never was about establishing safety or whatever nebulous terms he wished to use - is it the EU that has his empire turning human-centric and downgrading the other species? It was the pursuit of power for himself and for the Sith. The Jedi, at least, pursued what they thought was the best path to peace for all. That's a huge difference in objective viewing.