I do wholeheartedly agree with this so please don't think I'm disagreeing with the sentiment, Greco-Roman and Norse history has absolutely ended up used everywhere as myth, mostly I would imagine because they were two of the biggest religious pantheons take over by Christianity. And also I'd like to attach Egyptian gods to this too, and ancient Egypt in general, because they're also get this sort of treatment a lot, and without much understanding of the actual really complicated nature of the Egyptian Gods, especially outside of the main known few.
But I just wanted to point out people do retell Judeo-Christian stuff all the time. Admitted mostly of the angels and demons variety but on Jesus specifically, the most famous is obviously Dan Brown or the Life Of Brian stuff or that one alien Jesus idea that was reported scrapped from Hitch Hikers Guide, and if you guys haven't read some of the self published historical Christian romance stuff out there or the alien Jesus stuff out there, there's some good and hilarious times to be had. And that's not going into the amount of "God was the real villain all along" stuff which is everywhere. Which honestly also probably needs to stop being done because it's the same few stories/plots I haven't seen a new take on it in years either.