Interesting stuff. Were the nephilim a sub-human species like, for example, the neanderthals? Where do the reptilians come into the story? I thought they are the ones that supposedly bred with humans. Or maybe both?
And what about those greys? From what I've gathered, they are a genetically manipulated race that can no longer reproduce efficiently. Supposedly the draconians are responsible for that, and they are higher on the alien species hierarchy. If true, that would explain all of the accounts of sexual experiments on people by the greys.