Oddly enough, the idea of reptilian aliens among us has a tiny bit of a basis in reality - not so much that there is an actual race of reptilian alien shapeshifters living among us, but that there is most certainly something else going on that doesn't have a widely accepted explanation for it.
There is a large amount of evidence pointing to a large scale attempt at deceiving the general populace into believing that there are aliens that have been among us for a very long time. Shows like "Ancient Aliens" have attempted to show that alien races have been recorded throughout history and have been simply forgotten in our modern history. There is a push towards accepting that aliens are basically a reality in modern times, and there is an abundance of evidence in the form of home videos and such posted all over the internet and television... but there are a large number of holes in the theory of "aliens" being among us for this large amount of time.
an alternate theory is that this large amount of evidence and this push for believing in an alien presence is completely manufactured as a smoke screen. But for what purpose? There are two, far more plausible theories that seem to fit the deception going on here far better than the idea of a reptilian (or any other alien) race living among us.
The first theory is that these aliens are manufactured to ease the transition into a single world government, that there is absolutely no reality to the alien threat and that all evidence of alien influence is completely manufactured towards this end.
The second theory seems to fit even better, and is the theory that I personally subscribe to, until such time as the evidence points in another direction. This theory is that these "aliens", with all the copious amounts of evidence to their existence (from people with absolutely nothing to gain from manufacturing a story), do in fact exist. But what we have been calling reptilians, or aliens, are not what we believe them to be. They are not alien, but rather, are demonic.
These "aliens" are manufactured in order to bring about an alternate explanation to the apparently supernatural happenings that have been going on in the world, making people believe that the demons we have been told exist are simply misunderstood extraterrestrial beings... that there is no evil force that exists here on earth and is trying to corrupt us. And as an added bonus, will still usher in the single world government that Reagan alluded to.
I would highly recommend watching this video. It explains this theory and why it is far more likely a demonic presence masquerading as an alien one, what it is that is going on, and how it is that these peices of information might fit together in a way that makes far more sense than the theory that a reptilian alien presence has taken over our government.
The Real Story Behind Aliens Ufos Demons Illuminati & Satanism - YouTube