Not a crazy story. Massive worldwide flooding actually happed in the Younger Dryas. The Jews are not the only civilization that talks about The Great Flood, almost every country has similar stories.
There is no mention of Noah's crazy story but I have heard preachers claim that nobody believed Noah because there had been no rain before his boat building. The Earth was watered by a mist. Does this mean nobody fished or crossed waters one side to another? Did they even have bodies of water of any kind. For this story to be true god would have already made up his mind on destroying everyone else. There is also no explanation in the story of just what the "exceedingly wicked" people did to all be drowned. Obviously this whole story is a great myth.
The Impossible Voyage of Noah's Ark
National Center for Science Education: [ncse.com]