First of all, here is an alternative explanation of serpent symbolism.
David Icke was one of the first people to talk about reptilians, a race of people whom, according to his philosophies, have reptilian DNA.
According to David, they are in positions of power such as the Royal family and in positions of government in the US. Apparently there are 13 families who have been in control of everything for centuries. He says they are Evil, and we should be doing whatever we can to expose them and fight against their idea of a New World Order. David says that they are our enemy, that they are a different species, This is his website, exposing the reptilian bloodline.
The reptilian bloodline is nothing more than a myth for the Royal family and others are no more snakey than you or I, they do not have different DNA and they do not change into reptiles at will. They are in fact human beings but human beings ARE part reptilian anyway, so when we think about them being a different species or reptilian aliens, remember YOU'RE ONE OF THEM.
BEFORE THE GREAT FLOOD
There was once a great flood that drowned the whole planet, this is according to various sources, including the bible. Before this happened there were several different kinds of man like creatures on the planet. These included Hobbits, Giants, Pixies, Trolls, etc.
There were also highly evolved people called human beings. They were very tall people and revered as Gods.
The Spinal Cord and Brain of the Human Being

Notice the spinal cord and the brain together inside of the body of the human being, this is our reptilian heritiage. Neaderthal man also had a spinal cord but his brain is different. The brain of the Cromagnon man has a higher frontal lobe, so his forehead is high whereas the forehead of the neanderthal was sloped backward.
Homo Sapiens Sapiens - (us), has a bigger brain attached to the cerebelum and it sits there like some alien creature living off our bodies. It is almost like a simbiotic being that uses us and we use it in return. We keep it alive and it gives us cosmic thoughts, intelligence and consciousness.
Both the spine and the human brain are reptilian.
Comparisons of the Neanderthal and the Cromagnon man. Notice the Neanderthals sloping forehead and the Cromagnons higher forehead.

(Above: Neanderthal Man.)

(left: Cromagnon man - higher forehead)
THE SERPENT IS NOT EVIL
We get the idea that the Serpent is evil from the Christian doctrines that seem to make out this is the case. However the serpent is NOT evil in fact it is a symbol that has been used to describe God, the Sun, ressurrection and Christ himself. The Serpent has the ability to shed its skin and become reborn, it is a symbol of rebirth and healing, enlightenment, wholeness and oneness, and also symbolic of the highest and the lowest. Because of its apparent appearance in the Garden of Eden, facilitating in the fall of Adam, the Serpent has been given some very bad press and a lot of people have got the wrong idea of what it really represents.
Lucifer - Latin, meaning the "light bearer". He brings the light of knowledge to humankind and tells only the truth. Lucifer and Jesus Christ are one are the same and both are called the Morning Star.
The very word "Serpent" means "Shining one", that would be Lucifer/Christ, the son of God. That could also refer to anyone who is enlightened. The word "Illuminati" means "enlightened".
The Kundalini
During meditation one might experience a Kundalini. Your very own serpentine power that is located at the base of the spine will rise right up your spinal chord eventually reaching your brain, during which you will experience enlightenment as you never have before. It awakens knowledge and compassion within the human being and raises your consciousness so much that the whole experince is overwhelming. I experienced such a thing a few years ago and I cannot compare it to anything on this Earth as it is so amazing.
The Serpent is knowledge and enlightenment, and this knowledge is in our very DNA. The beings we know as the Annunaki, were water dwelling beings, who were Serpentine and who genetically engineered land dwelling bodies for themselves here on Earth.

The Serpent people are anyone and everyone, and there is no special bloodline of Lucifer and even if there was, all the stories about it being Evil are at best the fears of religious minded people who have been told that Lucifer is Evil by the preachers and pastors who have misinterpreted, misunderstood and mis - told the stories in the Bible.