because it is the original world destroying flood, told in the story of Noah's Ark, also in Greek, Egyptian, Sumerian, and Native American history

Ok...

And the reasons why are different.

the description of a godly force causing a flood?! so different

YEEEEAAAAH!

different stories.

because there are different belief systems and reasonings behind the earth's climate shifting and causing ice caps to fall into the sea and flood half the earth