"they also tend to occasionally indulge in cabbalism" Whoa, the Lurdi are into Judaic sorcery? Cool!
That being my chief problem with this otherwise-extensive and detailed writeup; it badly needs proofreading and editing. Aside from that, this has a honking lot of useful and thoughtful detail.
Well that was a fun read! Burning hunger, eruptive bloodlust, and you can't even trust your own mother? I think I would die of stress related heart failure alone in the first week. Since they selectively eat the sick and all of their own dead are epidemics common?
Anyway, while the initial concept is simple enough I think that the background makes it really great.