Well the watchers are higher dimensional beings than us. They can manifest themselves in our lower dimension. These are essentially inter dimensional aliens. People often forget that aliens could exist with in our own universe that we exist in in the physical form, and they could be creations just like we are. Maybe there is a reason God put us all apart from each other in different home worlds. How ever there are also higher dimensions not seen by the human eye and that is where the creator and his legions of angels are. So when people say aliens = demons or angels or angels, and demons = aliens. They could be bunching the two together. They forget the possibility of aliens with in our own universe existing as we do, and higher dimension beings exist in their own higher dimensional plain of existence simultaneously.