That must be a joke. How could Jesus, Yahweh and such be a mythology and the devil is real? Like I don't believe in Norse myths about Thor and Odin but the underworld ruler of Hel, Hela, she's real?
Actually Judaism doesn't really either. Satan is the angel of Yahweh in the OT. He sends him to deliver a plague and repeats the story in Chronicles and finally calls him Satan.
He is also one of the sons of Yahweh in Job and Yahweh and satan speak and Yahweh allows him to do errands, torture Job and so on.
Again, the Persian occupation, most of their mythology ends up in Christianity and late Judaism. Their devil Angra Mainyu was at war with the supreme God and lived in a fireland -
"During the
Second Temple Period, when Jews were living in the
Achaemenid Empire, Judaism was heavily influenced by
Zoroastrianism, the religion of the Achaemenids.
[26][8][27] Jewish conceptions of Satan were impacted by
Angra Mainyu, the Zoroastrian god of evil, darkness, and ignorance.
Modern ideas of Hell and of course the Revelation end times myth was used from the Persians:
Hell
The concept of hell, a place of torment presided over by Angra Mainyu, seems to be Zoroaster's own, shaped by his deep sense of the need for justice. • Those few souls 'whose false (things) and what are just balance' (Y 33. I) go to the 'Place of the Mixed Ones', Misvan Gatu, where, as in . the old underworld kingdom of the dead, they lead a grey existence, lacking both joy and sorrow.
Zoroaster was thus the first to teach the doctrines of an individual judgment, Heaven and Hell, the future resurrection of the body, the general Last Judgment, and life everlasting for the reunited soul and body. These doctrines were to become familiar articles of faith to much of mankind, through borrowings by Judaism, Christianity and Islam; yet it is in Zoroastrianism itself that they have their fullest logical coherence, since Zoroaster insisted both on the goodness of the material creation, and hence of the physical body, and on the unwavering impartiality of divine justice. According to him, - salvation for the individual depended on the sum of his thoughts, words and deeds, and there could be no intervention, whether compassionate or capricious, by any divine Being to alter this. With such a doctrine, belief in the Day of Judgment had its full awful significance, with each man having to bear the responsibility for the fate of his own soul, as well as sharing in responsibility for the fate of the world. Zoroaster's gospel was thus a noble and strenuous one, which called for both courage and resolution on the part of those willing to receive n.
The craze with Satan influencing humans all the tie is a modern invention, not a thing in early Christainity.
-During the
Early Modern Period, Christians gradually began to regard Satan as increasingly powerful
[145] and the fear of Satan's power became a dominant aspect of the worldview of Christians across Europe-
as you see the early modern era and modern era are really when evangelical puritan groups went Satan-crazy and blamed him for everything and all bad influences
Satan - Wikipedia
But no, all ancient religions had some kind of underworld, especially the Greek/Roman religions, with a dark ruler. The Pope and catholicism has been trying to move away from a literal interpretation of hell and wants a metaphorical understanding as hell is a "separation from God" type thing. But they get a lot of push back from fundamentalists who want a literal hell and a literal devil.