For an alternative time-line, what if a nationalist leader had not only *not persecuted the Jews*, but had co-opted them much like our very own neo-cons?
What if all the leading Jewish scientists - like Einstein - had not only stayed, but were active in the war effort? Heck, Germany might have had atomic weapons before 1939.
If so, it would have been game, set & match.
The irony was if you looked at Europe at the time WWI started, you could make the case that Germany was the least anti-semitic country in Europe.