Flying_Monkey said:
1. they did have metal swords when the book was written;
2. the god of the Old Testament is not a god of peace;
3. references to powers beyond people's comprehension are to divine powers not technological ones.
It's mythology / religion - stories of origin and the relationship of humankind with the unseen powers that supposedly created us. Some SF is mythic, but mythology is not SF. Religion and myth also serve as cultural unifiers - they are believed and form a shared basis for social norms; they are not just creative writing. When you confuse this you get Scientology - which really is SF as religion...
Again, you are just making the mistake of comparing things that look superficially similar, rather like the people who think that ancient pictorgrams represent aliens because they look a bit like common contemporary depictions of space-men.
1. OK, so what was it that the writers referred to as a 'Sword'?
2. OK, he ? wiped out a city, and then all but Noah and family.
3. OK, rh100 stole my words.
I consider that book as man's interpretation of stories passed down through the generations. Anything that could not be explained with reason, logic or medical knowledge of the day was accounted for by being classified as, as you say, 'devine'.
To me, it's one of the best reads. Much better than modern day SF.