Also, and I'm sure that I'm pointing out the obvious here, but "Children Of Cain" could almost represent "God's" view of the human race as told by a human. He is looking at humanity with disdain for their hypocrisy and what they have done in his name, using Manson (or whatever reflection of himself he may be speaking through) as his voice. Clearly the point of view is written from a human, almost an Adam Kadmon figure depicting the path of the rebellion which they have led, using first person statements such as "Us children of Cain." It's as if it is one soul looking inward at his own figure (as well as those around him, collectively) from an external viewpoint. "Don't assume that I'm always with you/It's just where my mortal body happens to be." Manson is a man with divine knowledge, (basing this off of "mortal body") an oracle , if you will. This also parallels the Macbeth influence, as well as that with the album as a message from the future sent to the Marilyn Manson of 1996.
Related: The song "The Gardener" is about a relationship in which you attempt to raise somebody to lean towards your direction, but you cannot make them who you are. "This is your world in which we will grow/ And we will grow to hate you." I think that song could very much be from a literal Godhead's (not the band,silly!!) point of view, rather than that of some intermediary figure.