"Judeo-Christian" (and now, Islamic) is a recent (Protestant) Western conception of the faith, so there's a presupposition. "Judeo-Christian" was an invention of the Cold War, and to promote the establishment of the political state of "Israel" among (American: victors of WW2) Christians in 1948. So, it's more of a political term than a theological one. It's not Christian in any historical sense.
You're somewhat correct in that we are
prideful/egotistical creatures. All sins,
including vanity, stems from pride. For example, why do we get angry? Because our pride is hurt. In the Eastern Orthodox Church, we're all about confessing our own shortcomings. There's actually this running joke:
"Humility"
So, we have to be neptic in that we don't fall into the pride of being humble and try to "out-humble" everyone else (because the virtue of humility is distinctly Christian). See Nietzsche's Slave/Master morality for more details.
Your understanding of the Fall of Man is also fairly innovative in that I've never heard of it presented in that way before. I can tell you that the Theotokos isn't eternal or divine. I'm not sure if that conception of the Theotokos is just a holdover from your Protestant upbringing/misunderstanding or a new theology of your own invention.
Is it possible that you may not know as much about Christian history/theology as you believe yourself to?
Would you like to answer the question I posed to you in my previous post?