I’ve been through this extensively.
A born-again Christian has Jesus in his heart and is a child of God. I don’t believe a born-again Christian can be demon possessed because the presence of Christ by the Holy Spirit in his life and spirit expels any demon.
However, a Christian can still be oppressed by the devil usually because he is believing lies from which he needs to be set free.
Jack Hayford when asked if a Christian could have a demon, he replied “a christian can have anything they want”.
Believers that obsess on crap like this are usually pretty sad people. My ex-wife comes to mind. Could not come up with any real emotional connection or even a base carnal desire for her husband, but she sure went through her daily rituals like clockwork. And accused me of being in league with satan when I asked for some tenderness from my wife.
Focus on the Light brother. Obsessing on the darkness is not a good walk...
Wrong. Becoming a Christian doesn’t mean you win a prize or get special treatment. You still have to carry your cross. That includes suffering.
Look at the lives of the saints. They suffered demonic oppression, even possession.