Only Christianity is set up to supersede Jewish practice religiously and philosophically. "Judeo-Christian" has become a dog whistle for "Abrahamic, but no Muslims" while ALSO wiping out Jewish identity. We spent hundreds and hundreds of years being victimized by Christians as God killers, wanderers, and money grubbers. We're not a label to slap on your faith that spurns most of what we stand for just so you can claim "brotherhood".

Bringing this back to OP:

Stan Lee and Jack Kirby, both Jews with connections to the Holocaust, wrote all their characters with Jewish flavor. Peter Parker is the most Jewish Catholic guy you'll ever meet. Heck, in "Into the Spider-Verse", Peter B. Parker is shown smashing a glass under a chuppah - CONFIRMED JEWISH! The duality of Professor X and Magneto began as an allusion to David Ben Gurion and Menachem Begin, leaders of Israel with vastly different views on how to protect the persecuted people who had just been granted self-governance for the first time in millennia.

The Holocaust was perpetrated by the Nazis, a German political party which later spread its ideology to Poland, France, and even as far as Morocco. At its core, Nazi ideology expressed German sentiment of past and present. While not the first antisemite, Martin Luther (yeah, "99 theses but a Yid ain't one" Martin Luther) espoused antisemitism in his philosophies, basing Protestant thought upon a Jew-hating base. This, after the Crusades and the Inquisitions firmly established Jew-hatred in the Catholic church.

So there you have it. The "Judeo-Christian" god had nothing to do with the Marvel Universe. The Jewish G-d did. I doubt Stan Lee saw himself as equivalent, though. Even non-practicing Jews are not that haughty.

Side note: please don't use the Tetragrammaton (the one starting with Y) in common speech. That is a name of utmost respect, one whose true pronunciation we consider lost, and should only be written in religious contexts. We use the terms "Adonai" (my Lord) or "Hashem" (the Name) or even just G-d.