How do we feel-demons and exorcists?

I believe in both.  My ex-wife took all my possessions.

Without daemons, computers would be but a pipe dream. As for Possession, at present it remains just vaporware.

I'm personally not a fan of dualism. I actually think dualistic thinking is causing a lot of problems in society today, because it's just too easy to hate whatever it is you brand as "evil", rather than seeing us all as a work in progress. I think it's better to try to see things more on a spectrum. Instead of good versus evil, I tend to see them as wise versus less wise, or egotism versus egolessness, etc. All human flaws come from weakness of character, a lack of something.

One concrete example of this is shadows. Shadows are nothing but an absence of light. You can't fight or defeat shadows, except by adding light. It seems to me that the same applies to so many human flaws. You can't defeat hatred with hatred, or intolerance with intolerance, or racism with racism--- not only because it's ineffective, but also because it's far too easy to become the very thing we hate. The only thing that can defeat those human flaws is growth, experience, and maturity. Hatred serves no purpose, and all it does is poison our own souls.

As far as the OP, I believe that we all have our own metaphorical "demons" to fight, the weaknesses within ourselves. Are there malevolent spirits out there trying to cause us harm? I don't know. If there are, then they hardly need to bother, because people do a good enough job making their own mistakes in life. I think most possessions are probably due to psychiatric or medical conditions, although I've never seen anything like that firsthand, so I can't say for certain. I tend to view any challenges in life not as the work of demons or evil spirits, but as lessons put in our paths to help us learn something from it. I see no reason to live in fear.

I only watched one Exorcist.

Pretty good film.

No but they make for good horror plots.

This sounds like the setup for Billy Joel's 'Piano Man'.

Maybe Sun Wukong (aka Monkey King) is due for a comeback?

Five hundred years of imprisonment does tend to mellow one a tad bit. Of course, the magic circlet he was tricked into wearing by Bodhisattva Guanyin also made a difference.