I just realized something. Throughout the course of the movie, Ratchet doesn't kill…anything! Clank only kills one guy–Victor–and even though Ratchet defeats Nefarious, he doesn't technically kill him. Qwark, Cora, and Brax all have higher kill points than Ratchet and Clank.
"So we fix our eyes not on what is seen, but on what is unseen, since what is seen is temporary, but what is unseen is eternal."