Sayid didn't murder anybody in that scene. He shot three criminals who were threatening his life after they kidnapped him and threatened his family. Pretty clear case of self defense.

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you're making far, far (far!) too many assumptions based on the very, very (very!) little we've seen of earth 2


I realize this is supposition on my part (which is of course half the appeal of Lost-trying to guess what's happening) and that is why I originally said "arguably" happier and not "definitely" happier.