I’ll respond to the one bit of evidence you put forward. I’m sure something happened to provoke all those flood legends, and personally I think there was a worldwide event, although not as dramatic as the UM holds. So anyway, I don’t have a problem with that.
As I read most of the rest of your reply, you’re just saying you believe Sessions because he provides lots of evidences. But if all those evidences don’t really prove what he says they do, then they add up to a big, fat nothing. I’ve taken apart several of his main arguments, and shown that they are fatally flawed. That’s fine if it doesn’t bother you enough to want to do some spot-checking yourself, however. I’ll just keep writing these things for the people who don’t have such unshakable faith in the UM.