IOW, you have no idea what is going on in Gen 3:15? You don't see a sovereign divine decree being issued to the serpent on behalf of Eve?
The Jude passage does not teach that God destroyed all the Hebrews -- only unbelievers did he destroy.
Furthermore, the Exodus out of Egypt precedes the Hebrews' wilderness sojourn and occupation of the Land. The Exodus was just the first leg in the process of salvation, and God rescued the Hebrews from Egypt not because they were believers, but rather in spite of their idolatrous hearts!
If you don't want to walk by faith and be destroyed like the saved Israelites who didn't walk by faith were, that's fine with me.