The reptillians are basicaly the demons of Judaism/Christianity and Djinn of Islam. That's not to say all demons are Reptillians rather reptillians are a particular race or subset of demons. They exist just outside the visible light of what our five senses can percieve or hell to use dogmatic religious terms.
Human beings are transmitters/recievers of energy and the reptillians feed off low vibrational energy humans emit. And so they deliberately create chaos, fear and misery to feed themselves. Some humans enter in pacts with them in return for money, wealth and fame. They assist the reptillians by deliberately creating scenarios in which the right enegy vibrations are continualy emitted. Wars, violence, poverty but also in more subtle ways like violent entertainment, pornography, spreading fear and uncertainty.