IMO, "demons" is a catch-all word used by ignorant people to cover anyone and anything that does not subscribe to their belief system. The word, as is used nowadays, is completely meaningless. As it was used in the biblical times, it did not mean "evil one". Check your Greek, Aramaic and Hebrew. "Daimon" and "Daimonion" did not necessarily have evil connotations.

While you are at it, we are taught that believers are going to be at table with the Lord. The Lord is going to separate the wheat from the chaff. The true believers are going to be harvested. OK, now, use your heads - what is wheat used for? Making bread (food) - consider that you WILL be at table with the Lord, but not in the seats. You are going to be on the plate, SERVING your Lord.