the word alien was coined after angel actually from the sumerians and it was translated to mean "those who came from the stars" or something like that. the whole demon thing is propaganda. think about what evil even means in the first place. it means you are mean. most people i know are evil in one way or another. there is a lot more going on out in space but at the moment humans are ants so i wouldn't go around insulting a race of something you know nothing of.