Cristians are told a story and they beleive it, all this is based on their "faith". There doesn't need to be any scientific evidence, basically just a few stories from different cultures about a huge flood, and some survivors to tell the tale = boom world wide flood, and Noah saved us all, no arguement can sway them, it's the truth. To question is is to question their "faith" so they blindly defend it to the death as fact. Don't blame or flame Marty, he has been brainwashed and is beyond reason. I wonder if he was ever a Catholic altar boy?
Of course the logistics of an arc, getting the animals, etc etc is what most skeptics point to, but for me I gotta think that the world was a really small place back then, no books, maps, internetz, etc. Perhaps Noah actually existed, and perhaps where Noah was there was a huge flood, perhaps he did build a boat and got some animals on it, he may have even got every animal that he thought existed at the time, maybe 50 pairs of animals cause he didn't know any better. Without books, maps etc how was he to know there were millions of species of animals. So he waited for the flood to end, he saved the world, or so he thought, and so it was written. 100 animals turned into two of every animal, 90 days turned into 900 years, a 100 square mile flood turned into a global flood. I mean we know how much a story can change in a week, your buddie's 12" fish turns into Moby Dick after a couple beers, imagine what happens when someone writes a holy book hundreds / thousands of years after the fact......
Lets say this same thing happened a few other places, hence the folklore about the global flood. How the hell did they know there was a global flood, do you think they had any idea on the size of earth, they only knew as far as they could walk or see. Meanwhile, while he is floating on his boat with 100 animals that he thinks are the only animals in the world at the time, on the other side of the planet, in every other country that he didn't know existed, there was no flood, the natives in north america (or whereever) are hunting as if nothing is going on.
I don't know what the hell happened. I do know that the churches fool their followers with "faith" to mindlessly control them get them to hand over their money so the church can buy land, and molest their children.
When you stop beleiving in fairty tales, imaginary men in the sky, fake books etc your world opens up, my hope is that people like Marty are able to come to this realization sooner then later so they can enjoy the rest of their lives, rather then being bound by a "faith" that restricts free thinking and rational thought.