Prophet or prophetess means one who speaks for God. Spirit of Jezebel is a spirit of idolatry, fornication and murder. An idol is that to which a person gives himself. Therefore, an idol can be a job, money, position, possessions, pleasure, sports, business, family, self, sex, knowledge, power, recognition, etc. For this ye know, that no whoremonger, nor unclean person, nor covetous man, who is an idolater, hath any inheritance in the kingdom of Christ and of God.
Idolatry usually leads to fornication.
James 3 Given space to repent, but she refused. Some call this the devil's millennium. The Church cooperated with false teachers. Multitudes were led astray. Instead of repenting, some in charge of the Church often had the true servants of God killed.