Naruto may not take a life but he destroys every character with his shonen heart. Why kill an enemy when you can turn them in to your ally?
Edit: On another note, I just realised that a massive power up is coming Naruto's way; if the four Hokage and Orochimaru's arms have been released in this ritual, then so should have the Yin half of Kyuubi's chakara. I think after this latest attack the Jyuubi will transform in to its final form and the power upgrade will give Naruto a fighting chance and the ability to keep up with what it does.