Demons were bound for centuries?

[adamtfm]

I have made post "Exorcism and possession. Mit or fact?"
I got the answer by good will of lydia_666.
http://www.angelfire.com/empire/serpent ... _Rose.html

Its good read but I will be pleased if somebody would like to explain to me this part. Its very disturbing.

"In closing, the Demons were bound for centuries. Anneliese Michel (the real name of "Emily Rose" was supposedly "possessed" in 1968. I can reassure you the Demons including Belial were bound and it was not until very recently were they released. I know because I was involved in releasing them. Only now are they able to come forward and defend themselves and reveal the truth to those who will listen. "

How, when, why and by who Gods were bound and why they needed any human to release them. Its confusing and disturbing for obvious reasons and need to be explain more.