Beelzebul (Beelzebub) is the New Testament title for Satan deriving from the Old Testament Philistine deity Baal-Zebub of Ekron (2 Kgs 1:2-6). Christ's opponents accused Him of casting out demons by Beelzebul, prince of the demons (Mt 12:24); Christ exposed the absurdity (a kingdom divided against itself cannot stand) and made the moment a teaching on the Strong Man bound. The original pagan deity has become a synonym for Satan himself.
Old Testament Philistine deity (Baal of Ekron); New Testament title for Satan as prince of demons.
Old Testament: Baal-Zebub (lord of flies) was the deity of Ekron. King Ahaziah sent to inquire of him in 2 Kings 1; Elijah intercepted the messengers.
New Testament: Beelzebul / Beelzebub appears seven times (Mt 10:25; 12:24, 27; Mk 3:22; Lk 11:15, 18, 19), always in opposition contexts. Christ accepts the identification (the prince of the demons) but denies the accusation (that He works by him).
Matthew 12:24 — "But when the Pharisees heard it, they said, This fellow doth not cast out devils, but by Beelzebub the prince of the devils."
Matthew 12:26 — "And if Satan cast out Satan, he is divided against himself; how shall then his kingdom stand?"
Matthew 12:29 — "Or else how can one enter into a strong man's house, and spoil his goods, except he first bind the strong man?"
2 Kings 1:2 — "And Ahaziah fell down through a lattice... and sent messengers, and said unto them, Go, enquire of Baalzebub the god of Ekron whether I shall recover."
Modern Christianity often forgets the continuity from Old Testament Baal worship to New Testament Beelzebul; the demonic powers of the Old Covenant did not vanish in the New.
Paul says explicitly: the things which the Gentiles sacrifice, they sacrifice to devils, and not to God (1 Cor 10:20). The pagan deities were demonic powers, not nothing. Baal of Ekron was a real spiritual entity; in the New Testament he is named among the demons.
The household's implication: the modern equivalent of Baal worship (whatever it is — sex, money, status, ideology) is also a real spiritual entanglement, not just a moral failing. Idolatry has demonic dimension; the recovery is repentance and renunciation, not just behavioral adjustment.
Hebrew Baal-Zebub (Baal of flies) and Greek Beelzeboul.
Hebrew Baal-Zebub — lord of flies; the Philistine deity of Ekron.
Greek Beelzeboul — possibly ‘lord of the dwelling’ or a derisive variation; the title applied to Satan in the Gospels.
"Pagan deities were demonic powers, not nothing."
"Idolatry has demonic dimension; recovery is repentance and renunciation."
"Christ's opponents called Him a Beelzebul-collaborator; He is His Master."