Well let’s start at the beginning here for Christianity.
El was the supreme Caananite God. The ineffable creator and patron God of the Caananites and specifically of the Israelis.
There is some argument that JHVH may have arisen like many gods, as a cultural hero who became a god. Early on, he was a minor, tribal patron god of Judah.
Well, Israel and Judah were smack in the middle of territory constantly being contested between the Hittites, Babylon and Egypt. So they ended up getting conquered a lot and paying tribute to whomever ruled them this month. The wars and revolts got messy, Babylon came in, kicked their asses, took Jerusalem and carried off the better part of Judah into exile. They left behind a new Judean King, who invited refugees back and then got assassinated. Some mess later, the Babylonians came back a second time, carried off more of the population, killed most of the rest and destroyed Jerusalem.
It was those exiles, carried off to Babylon from Judah, who wrote the books and told the story from then on, and JHVH was their [del]man[/del] God. So JHVH eventually took on all of the attributes of El and the other Caananite gods and became THE ONE TRUE GOD of the Jewish people.
But all that was in the @600-700 BC range.
Where was “God”/JHVH/Jehovah before that? He was El. Before El he was likely An/Anu of the Babylonian pantheon, the supreme ineffable creator god there, who was worshipped at least as far back as 3,000 BC and maybe as far as 4,000 BC.
Thing is, even in Babylonian mythology, An/u isn’t the first god. They have a long string of begats there too. A line of worshiped gods that goes back into unknown time.
So if JHVH is your ineffable creator god, you’re worshiping this idea under a name that is at most about 3,000 years old and who originally wasn’t any kind of supreme god, but the tribal patron god of a bronze age culture living right in War Alley between three major empires. And you’re attributing the same laws and rules, culture and ideals of that culture to your UberCreator God of the Universe.
Who adopted a role played under many different names by different cultures, including the one that influenced all others in the region, for at least 3,000 years before that and likely for considerably longer.
A God who became Hellenized and part of the foundation of Western Civilization as it spread, conquered and forcibly converted Europe.
Who is being altered again and becoming Americanized and very very different by American Conservatives.
Who has claims of prophets with powers granted by God in ancient days, but who clearly hasn’t seen fit to do the same in 2,000 years through his old religion and multiple versions of his new religion. Each of which claims to be the real truth, the real religion serving the real version of JHVH, while all the others are false.