The ending of quarintine?

when angela and the camera man were in that room they show us rats in cages and stuff. So i know the guy living their caused this by experimenting, but what i dont get is the newspaper clippings of cults an doomsday. why did they show us that? what was that all about. And what i really dont get is the tape recorder. wat the hell was on it, it sounded devilish.