The Illuminati are blue-bloods who have awakened to their identities, and use their illumination and positions of power to steer mankind toward the goals of resurrectionists, namely a New World Order. This is what the eye of lucifer atop the unfinished pyramid on the United States seal stands for. But because resurrectionist souls are so incompatible with normal human bodies, an entirely new race must be created to allow mass incarnation and existence upon earth. This is what alien abductions are all about. The resurrectionist masters are known collectively as infernals, the leader as Lucifer, and the physical ones as reptoids or sauroids, and their worker automatons as greys.
Greys do the abducting, and the rest follows.
The existence of Lucifer is logical, for we know that not all entities are equally developed, meaning there must be a highest and weakest of entities, and Lucifer by definition is the most powerful of the negatives. So those who were excluded from the program originally are looking for payback, and think they can get it if they do it in time. This has all been allowed to occur because for the past two thousand years, earth's EM grid has been in the negative half of its oscillation, allowing evil entities to infiltrate our reality and screw with our history. If the resurrectionists do not succeed by then, if they fail to root themselves physically in our world, then all is lost for them. To top it off, they require several of their infernal masters to be born as humans to take the reigns of power as antichrists.