Demons are very powerful but are rarely physical. Usually they posses someone’s mind by getting them to focus on inappropriate or unhealthy activities which weaken the individual’s moral turpitude and causes a spiral into further degradation which allows more powerful, subtler demons access where they would nor could not. This allows them to infect more than one person at a time and so with immunity. Their playthings are your fears, weaknesses and desires and they feed off of them and use yours to infect others. They will not willingly move on without serious intervention either on the part of the possessed (which is just about everyone), which is usually difficult for the individual to muster without help.
Do you really think that you are not possessed by demons? Think about some of the things that you have regretted ever doing that you have done and ask yourself why. Demons use tricks like blinding a person to facts using the artificial light of cool or the dimness of rhetoric. They also desensitize us by a continuous stream of sensitization and promoting continuous anger. When things go wrong you are subtly motivated to blame others or even GOD for your own short comings or poor choices. They even make it seem right for you to punish yourself to get back at others or over dramatize to make a vague point seem more rational. They cloud your sight with predigest perspectives and filter your needs with frustration and add confusion and fear.
The more the human race is infected the further into degradation and self-destruction we fall. This leads to wars and lawlessness. We are not the victims of poor government nor unscrupulous business practices but personal immorality which hides in phrases like little white lies and it’s okay for me to do this because everyone else is.