The question of "what do you do when someone actually wants nothing but to kill you?" is the real problem with pacifism at all costs. Taken to its logical end in an imperfect (and violent) galaxy, total pacifism is a suicide wish. Which is maybe fine for an individual. But I have to take issue with it in the ruler of a society, especially a society where there is clearly some philosophical dissent. Is Satine really going to stand by and watch Separatist tanks roll over Mandalorian children for the sake of her principles? And are Mandalorian parents going to let her? But then she has the excuse--as pacifists in the minority always do--that any bad consequences are the fault of all the people who interfered with her attempts at a peaceful solution. If they had just listened to her from the beginning, she could have talked the Separatists into converting their armies to nanny droids. . .

As to pacifism in the OT--I have seen it argued that Luke's decision to throw away his lightsaber during the duel in ROTJ was a conversion to pacifism. Given that he has his lightsaber back on his belt during the celebration later (and therefore must have gone to some effort to retrieve it before escaping the Death Star, despite everything else he was dealing with at the time) I think that reading of his decision is a little bizarre.