She says this shit because she was indoctrinated thusly, it got her votes. As to your other question...yeah, why?

The Red Sea also filled in when sea levels rose at the end of the last ice age.

Another consideration is that people may not have traveled all that far form their home villages. When the flood came form rising sea levels it could have covered up the entire world that a person knew or was aware of. Thus the idea of the "entire world" flooding.

@snytiger6 Yes and more than a possibility given the Australian Aboriginal tribes who once lived by the coastlines tell a story of the sea rising up to swallow the lands where they once hunted and fished.
Plus, when they were cutting the Sydney Harbour Tunnel they discovered, to their amazement, that running right through most of the harbour was a very ancient, very thick layer of river silt and mud following the course of a very large river that flowed out to sea from the mainland.
Tests conducted on samples of the silt showed that it was lain down around the same time as the end of the last ice-age which coincides with the same aboriginal legends.

The Gilgamesh story is about the search for immortality, which is just where religion comes in: it protects people from their death anxiety. Read "The Worm at the Core."

@BirdMan1 Yes, but it also mentions, in somewhat depth, of a Great Flood as well.

He rips off more money from medicare with that crap, than Trump has law suits against him.

It is possible that at the end of the last ice age as the ocean levels rose that the Mediterranean, the Black Sea and the Red Sea, which may not have had any, or had very little water in them before the sea level rise, flooded and became connected to the oceans. If a person never traveled more than ten miles from their village, then their entire world would have flooded and it would seem like the water covered the entire world. With no written language at the time the story would have been passed down by word of mouth, with each story teller adding in the own little bit. The video above shows four different versions of the story, after written language started.

@snytiger6 Can you just see the water pushing through the Bosporus straits? Or, what became the Bosporus Straits?

@BirdMan1 It might have been a river before the water levels rose.

@snytiger6 The Hudson river, in New York is known as a "Flooded river," with its old route visible for miles beyond the current shore line.

@BirdMan1 Well IF you were to look up the Doco I mentioned then you'd see the actual, evidence of it occurring for yourself.
The Doco also went as far as proving that during the last Ice age the Mediterranean Seabed was about 90% dry land.

@Triphid I was not contradicting you, but adding a piece of evidence in support of what you said. Flooded rivers are probably all over the world. Ut-Napishtim, as mentioned in the Gilgamesh story, was a Sumerian, and has been credited with being the original model for Noah. See Colin Renfew's "Before Civilization."

@BirdMan1 My comment was an attempt for someone to try to see that such an in-rush of water via the Mediterranean basin could easily have burst through the Bosporus Straits.

@Triphid Yes, got it.

God was always working on ways to scare people into submission in those days.

@DenoPenno Believe in me, and the right things about me--OR ELSE! They call this god almighty, but that sounds needy and pathetic to me.

Yeah, I to wondered about that claim..

@Joanne Sounds too much like Donald Trump to me.

@DenoPenno And let's not forget Stalin, Hitler and all those other Despots as well.