The main thing demons want is for us not to believe that they exist. That gives them full reign over us by blinding us to their reality. For a long time he had gone naked and lived among the caves of a cemetery. People in the community had tried to control him by binding him in chains and shackles, but he would always break free and return to the wilderness of the graveyard. The demons had taken control of this man so fully that they drove other people away from him.
Demons are like that.
They are extremely possessive. They want you all to themselves. They will do everything in their power to keep others away from you, especially others who want to help you. J esus asked the man what his name was. This poor man had lost his identity.