After a second watch, I'm okay with this. DV was down, and murder is not the Jedi way, whether smart or not.
I've often thought that what makes the Sith so dangerous to the Jedi is not their power, or treachery, or relentless violence, it's that a point comes where the Jedi has to back off if he is to retain his power. If fear, or anger takes hold, they either lose their grip on the force, or fall into the grip of the dark side. I see it as a metaphor for the adage that good has no guarantees against evil unless good is very, very smart.