Your challenge, is, if you accept it, is to create a European Jewish state with a POD after the Fall of Rome.
I was thinking more Ethnic Jews then converts. And I was actually thinking Central Europe. I have a story where there are these Jewish dukes in Central Germany.Khazaria was this OTL, although how much of the population converted is uncertain.
Third: Jewish SSR - Stalin creates a Jewish SSR as a PR stunt. This would not be much more than city-state somewhere
All that source has is a tiny bit about rumors of Jews being granted rights, and then later on an official of the Imperial Russian government denying that any such measure has been taken. The fact that the Tsar paid lip-service to Polish nationalism during the war and gave vague promises of Polish autonomy (just like other vague promises Nicky gave about constitutions and dumy) does not prove much.I have been reading source documents for WW1, the link is from a New York Times Quarterly publication from early 1915, for articles from 1914. Page 361 could be interpreted as the Tsar promising the Jews a state. A few pages earlier in the magazine, the Tsar promises Poland to be state under the Tsar.
http://books.google.com/ebooks/reader?id=50FIAQAAIAAJ&printsec=frontcover&output=reader&pg=GBS.PA361
If the link does not work for you, go to google ebooks, google current history, 1914.
For a pre-1900 POD, maybe an earlier Tsar sees a 4 part crown easier to administer than there current situation. (Finland, Russia, Poland, Jewish). This might tie into Pan-Slavic ideal, and obtaining extra support with the Western Slavs and Southern Slavs. For example, maybe to entice Bulgaria to join to a five part crown, the other 4 part crown is create. I am not highly familiar with Pan-Slavic movement, but if early in WW1, the idea of a Jewish and Polish state was floated, it was likely discussed in the ruling classes pre-war.
Should this even be in Pre-1900? I mean any POD and butterflies that are going to result in a Jewish state in Europe prior to the 20th century is going to completely butterfly away WWI & II, which seems to be what everyone ITT is discussing..