Yeah, and it's also possible that while humans couldn't openly resist the demons, some people had some secret hope in the form of tales of a savior that could rival the demons' power. They wouldn't openly discuss the subject, but still cherish it in very Private moments so that they could live their days somewhat.
"And Jade Chan became a wily accomplice in the battle versus evil." Turned out to be Jade. It is possible that even history have been altered, a savior will be chosen to correct it. It was hinted that Jade is the true Chosen One that the monks have been looking for.