all stories told in the bible are simple re-hashes of ancient sumerian or other ancient civilsation god stories. The bible was just yet another religion that was sayin gthe same thing, in a slightly different way.
Nothing is new.
Nephilm came from heaven, had sex with the daughters of man, and created humans. This is the same all over the world basically. Like in Genesis, where god takes the rib of Adam and creates Eve. That story was already told 1000's of years before in Sumeria.
The gods came down and genetically modified the pre-human species. It can clearly be seen in Sumerian concial art releifs.
Jesus Christ was just a tool used by Christianity to draw people in to their new brand. Theres plenty of proof Jesus spent about 15 years in Tibet before he returned to Jerusalem. He probably got most of his wisdom from there.