[quote=Kaga]
In his canon, Vash has saved the lives of men he knew to be murderers. Multiple times. As far as he's concerned, there is never, any acceptable excuse to kill another person. Not even "for the greater good", regardless of how obvious of a choice that "greater good" is. Even if the death of one person/entity would clearly save countless other lives, he still wouldn't condone killing that one person because, as he puts it, "no one has the right to take the life of another". And that belief is absolutely, completely inflexible. 

...And that's part of the reason why he's so much fun to have around, especially in this setting. 
[/quote]

And will lead to such a glorious disagreement when Archer's attitude actually makes some sense. Archer and Shirou are so intrinsically opposed to Vash's attitude... XD