Have I Changed My Mind About Demons?

Have I Changed My Mind About Demons?  I'm always trying to
learn and think of things differently.  Demons are a
complicated topic.   Most people believe that Demonic
entities never walked the Earth in human form, but what if that
isn't the case at all.  Could this be a case of mistaken
identity?  What if grumpy and evil people in life spend their
afterlife tormenting us and trying to harm because they are just
evil individuals, not fallen angles that aligned themselves with
Satan.