There is only one Creator-
God, the Judeo-Christian Jehovah, as St. Irenaeus states, but there are many gods (small g).St. Augustine, for example, said that all of the gods of the Greco-Roman pantheon were demons. St. Augustine dis not deny that these gods (demons) exist. They do exist and have a measure of real power, but they are false, treacherous gods, inclined to deceive and betray those who believe on them.
Exodus 20
20 And God spake all these words, saying,
2 I am the Lord thy God, which have brought thee out of the land of Egypt, out of the house of bondage.
3
Thou shalt have no other gods before me.
COMMENT: Verse 3 implies that there
are other gods (plural / demons), but we are to worship the principal God of Israel, Jehovah, and none other.
To advocate strict monotheism (only one god), which the Bible does not teach, is to deny the reality of spiritual warfare in which we are engaged. Demons (gods) are not imaginary.
Mark 5
2 And when he was come out of the ship, immediately there met him out of the tombs a man with an unclean spirit,
3 Who had his dwelling among the tombs; and no man could bind him, no, not with chains:
4 Because that he had been often bound with fetters and chains, and the chains had been plucked asunder by him, and the fetters broken in pieces: neither could any man tame him.
5 And always, night and day, he was in the mountains, and in the tombs, crying, and cutting himself with stones.
6 But when he saw Jesus afar off, he ran and worshipped him,
7 And cried with a loud voice, and said, What have I to do with thee, Jesus, thou Son of the most high God? I adjure thee by God, that thou torment me not.
8 For he said unto him, Come out of the man, thou unclean spirit.
9 And he asked him, **What is thy name? And he answered, saying,
my name is Legion: for we are many.
10 And he besought him much that he would not send
them away out of the country.
11 Now there was there nigh unto the mountains
a great herd of swine feeding.
12 And
all the devils besought him, saying,
Send us into the swine, that we may enter into them.
13 And forthwith Jesus gave them leave. And
the unclean spirits went out, and entered into the swine: and the herd ran violently down a steep place into the sea,
(they were about two thousand
and were choked in the sea.
14 And they that fed the swine fled, and told it in the city, and in the country. And they went out to see what it was that was done.
15 And they come to Jesus, and see him that was possessed with the devil,
and had the legion, sitting, and clothed, and in his right mind: and they were afraid.
16 And they that saw it told them how it befell to him that was possessed with the devil, and also concerning the swine.
COMMENT: A Roman Legion was typically composed of 4,000 - 6,000 soldiers.