There were no Hebrews, Israelite's, Jews, Greeks or even any Synagogues in the days of Enoch before the flood as the term Hebrew was never mentioned before Abraham was called one in Genesis 14:13. The fact that Enoch is mentioned and also quoted in the Torah and in the NT shows that he wrote this book which would have been around the 2nd century. Check out the two websites I posted as I am only young yet in my research.
He didn't use a Gentile Nation to bring in the messiah. His perogative.Any revalation of God after Abraham was Only through his lineage.a gentile didn't wrote the Torah. Enoch had sons up to Noah and Noah is his descendant and passed on his story to his three
It's mentioned I believe that Noah preached and 8 believed surely the prior history creation,sim etc was passed.none of it was recorded prior to Moses. If it was it's long gone. Enoch isn't even found in complete texts but pieces of it put together from different sources if I read that right.It's originally in Hebrew,nome of that remains. It's in Greek now.