Poor Dale. I didn't like the guy, he was annoying, and kept preaching about civilzation (newsflash Dale, civilization IS dead), but he didn't deserve to go like that. I hope Carl feels like crap.
Dale, I think, was only trying to keep the group grounded by telling them not to give in to despair and that there is always hope. As for Carl, I hope he feels really, really, really crappy. What a little jerk. Someone needs to start paying more attention to him and his activities.