This blog opens up the times when serious mental illnesses were seen as 'demonic possession '. Add a sin factor to someone who is already suffering beyond.
Today also it's not much better people like me, with mental health issues are judged and called weak but I cannot imagine how worse it could have been if I was called 'demon' for something I have no control over.
I am glad that people like the preacher in video are comparatively less and hopefully seek growth in their lifetime, because that's what get's you closer to God.
You cannot live in the past and yet be in the present.