Below is the Indus Valley Seal showing Pasupati Shiva, and the Gundestrup Cauldron found in Denmark depicting the Horned God that European Christendom turned into "the Devil."
In other words, over the course of the development of the Abrahamic religions, Yama, the Hindu Lord of Death and Hell, was rendered as “God” (Hebrew Yahweh), and the figure who was formerly “God” (Sanskrit Brahman), i.e., to Abraham's forefathers, became figured as “the Devil” by the renderings of Judeo-Christian mythology. Related to these conjectures, it seems the Hebrew rite of circumcision is similarly derived from a Hindu incest taboo rite.
I later explored that strand of the historical narrative to conclude that indeed, papa Abraham was a “Hindu” (if not a term coined until three thousand years later) before he went apostate and left the homeland and faith of his fathers. Voltaire (1694-1778) posited that Abraham and his crew were a tribe of traveling Brahmin priests (Godfrey Higgins, Anacalypsis, 1833, Vol. I, p. 405). Abraham, Sarah and Hagar (Abraham's wife and her handmaiden, according to the Hebrew tradition) indubitably sound like Brahma, Saraswati (Brahma's Consort) and Ghaggar (the name of a tributary river to the Saraswati River), too much to be mere coincidence considering where Abraham and his tribe are touted by the Old Testament to have originated. Some have further posited that the three Abrahamic religions, Judaism, Christianity and Islam, are respectively very much patterned after the Hindu Trimurti, Brahma, Vishnu (Krishna) and Shiva, the names of God as Creator, Maintainer and Destroyer according to Hinduism, and thus the three primary Personalities of God according to the religion of Abraham's forefathers.
Essentially, Yahweh, worshiped by Jews and Christians as “God,” is actually the being Abraham's forefathers knew as the Lord of Hell!! And then what did the Abrahamic project do next along those lines of reasoning but to render the figure who was God into “the Devil” in their myth-making.
He is the god of departed spirits and judge of the dead. A soul when it quits its mortal form repairs to his abode in the lower regions; there the recorder, Chitragupta, reads out his account from the great register called Agrasandhani, and a just sentence follows, when the soul either ascends to the abodes of the Pitris (Manes) [ancestors], or is sent to one of the twenty-one hells according to its guilt, or it is born again on earth in another form. (http://www.mythfolklore.net/india/encyclopedia/yama.htm)
Next diatribe of madman religio-historical theorization, whether published here or elsewhere: Jesus was originally born as the Son of Shiva and Vishnu (that one time Vishnu/Krishna manifest as a sexy Goddess named Mohini) who is named Ayyappa, the Protector of Created Beings . . .