The only way I'll not kill him (fuckuda) is if he kills Kira by Athrun's hand. Accident, intentional, what have you. As irrational as it seems to the common person, this would make ME happy.
And to save your fingers, no I don't give a rat's ass about how horrible it would make the show and how kira-lovers would hunt me down and stab me with their plushies. I'm just saying what would make me happy.