I think scale matters as well. If you press a button and thousands of people die, can you even process that? Is the death star explosion something Luke is even capable of dealing with? Can you even emphasise with tens of thousands you barely new beyond the bare minimum? Those are some questions I don't think any game system can really answer, nor would I feel it fair to rule on them at all one way or the other.
Now, assassination, that's something much more personal. If you do it properly, you are going to study your target for a time, get to know their routine, their habits and develope some sort of rapport. Unless you have a complete disconnect for the task that then follows, it definitely is going to affect you. For quick, in combat snap shots, well, maybe, eventually. A lot of things factor in: Can you see their faces when they go down? Can you hear them screaming? Or is it just another monster in white armour? How do you see your enemy? Are your past experiences such that you demonise them, which makes things easier, or have you seen their human side and possibly emphasise them?
A lot of things factor into this scenario. So many, I really have to say: Handle it on a case by case basis for each character.
I think it was Marilyn Manson who was the first to say, "the death of one is a tragedy / the death of millions is just a statistic" I think conflict should be handed out for the example of blowing up the Death Star - not to try and drag the character into the Dark Side, but to represent the ordeal of what they went through and the imprint such an act would leave on their psyche, despite everyone's back-at-the-base post-rationalisations. If we don't want to touch upon that with the Morality/Conflict mechanics then perhaps it would be better to treat it as AoR territory.
That was Joseph Stalin, actually...
I would give the Sniper, and Luke, Conflict.
An outright assassination is murder. Doesn't matter if it's Tarkin, the Emperor, Mon Mothma, Jar-Jar, or a child. It's murder. 10 points. More for the child.
A tactical sniper-shot, where you're taking out a sentry so an Alliance strike team can infiltrate an Imperial base and blow it up is worth Conflict. You are taking a life suddenly, unexpectedly, denying the target any chance of option or action. But; it's part of a war; more specifically part of a tactical engagement. Arguably Murder, but I'd give it 5 points. Maybe 3. It's the same as if you jumped out of the shadows and lightsabered a stormtrooper sentry. You initiated the combat by being the aggressor. That's Conflict.
If the sniper-shot is for defensive measures; taking out an At-St driver during a battle; that would be no Conflict. Or maybe 1 point, max. It's part of combat, the battle has been joined.
Luke I probably would have also given Conflict for, at least a little for the monumental weight of killing over a million people all at once. But it wouldn't be much, because they are all Imperial Soldiers. They all are part of the Imperial War Machine, and the Force may not care about them "just following orders". It was still a massive loss of life, but the Alliance was under attack. On the defensive. Everyone on the battle station was in part responsible for the murder of an entire planet, filled with billions of lifeforms. The Death Star then moved on to try and kill another planet; Yavin IV. They were aggressivly moving the Death Star into position to blow up that planet. That makes the Death Star crew the aggressors, Luke the reactor, and thus his actions are a bit more justified in the morality of the Force.
Basically, when assigning Conflict look at intent and at what point there are no other options available. Luke had two choices at that point in the trench; kill the Death Star or die and have it blow up people and a cause he cared about. The Sniper has a lot more choices, including not taking the shot, until the outside circumstances start limiting his options. Unless the target is about to do something that's going to kill people right then and there, the Sniper's action is going to earn a chunk of Conflict.
Edited by DarthGM