His idea of demons is anything to do with Christ, who came to destroy the work of the devil.
Rom 1:25 Who changed the truth of God into a lie, and worshipped and served the creature more than the Creator, who is blessed for ever. Amen.
Rom 1:26 For this cause God gave them up unto vile affections: for even their women did change the natural use into that which is against nature:
Rom 1:27 And likewise also the men, leaving the natural use of the woman, burned in their lust one toward another; men with men working that which is unseemly, and receiving in themselves that recompence of their error which was meet.
Rom 1:28 And even as they did not like to retain God in [their] knowledge, God gave them over to a reprobate mind, to do those things which are not convenient;
Rom 1:29 Being filled with all unrighteousness, fornication, wickedness, covetousness, maliciousness; full of envy, murder, debate, deceit, malignity; whisperers,
Rom 1:30 Backbiters, haters of God, despiteful, proud, boasters, inventors of evil things, disobedient to parents,
Rom 1:31 Without understanding, covenant breakers, without natural affection, implacable, unmerciful:
Rom 1:32 Who knowing the judgment of God, that they which commit such things are worthy of death, not only do the same, but have pleasure in them that do them.