I'm also intrigued by Connor's involvement in all this - it does strike me that with his Quortoth upbringing he very much is a creature of both worlds, so he sort of operates as Angel's mirror in that dual-identity thing (Angel/Angelus, Connor/The Destroyer).

I would have to say that I'd be disappointed with this story if the most it had to offer was some kind of "barbarism must be answered with more barbarism" argument. I would hope that we'll be getting a little more depth than that. Human history has plenty of lessons on that kind of thinking - eventually, all it gets you is total destruction, and then a new culture takes over. Which, again, thinking about Connor, and the idea of human/demon cooperation... there's something that could be drawn from that.