I believe you're holding Nate Silver up to an unrealistic standard. This is obviously not a complete refutation of all of the stolen data, nor does it claim to be. He is instead taking an instance of what people are complaining about -- a pretty standard example of the things that get pasted about this story, from what I've seen -- and pointing out that people are blowing this particular one out of proportion.

Maybe you're complaining that no one is really complaining about this specific email, but to me, this one looks a lot like the others contained in the stolen data that I've seen. From my perspective, it seems a lot of people are reading what they want into the emails, though I'll readily admit I haven't spent my day pouring through it, nor do I really intend to.