Demons Are Not Fallen Angels

The Christian teaching that says demons are fallen angels is false, the truth is, demons come from within a person

Mark 7:21-23 For from within out of the heart, proceed evil thoughts, fornications, thefts, murders, adulteries, covetousness, wickedness, deceit, licentiousness, an evil eye, blasphemy, pride, foolishness:

all of these things come from within & defile the person