Iron Dream Scenario: Possible?

Okay, for those who don't of the book, here's a wiki article.
http://en.wikipedia.org/wiki/Iron_Dream

Here's my question. Is this plausible at all as an ATL, or just good metafiction? Understandably, Hitler being a science fiction writer is somewhat ludicrous, not to mention the time he would have in the USA.

Note: Sorry if this is in the wrong place. Please move if so.
 
Nothing's impossible I have found .....

But this is a highly highly unlikely scenario.

On the other hand the book is a bloody good read.
 
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