Oh man I see what they're doing! Every episode is centered around Zuko bonding with the other members. That's a really nifty idea! Katara finally trusts him. I was worried they were going to show him egging her on to kill the dude, but I'm glad that wasn't what they were going for. It was still a bit worrisome when Katara bloodbended that one soldier though.
But all this non violence Aang is all of a sudden preaching... kinda conflicts with what they've been going through the past three seasons.
Aang has always been fine with fighting, it's the killing of the Fire Lord (murder) that he has a problem with. ---