When I was in college, I found a little booklet published by a Jewish organisation in New York (1916). I have been trying to track it down to cite it on this thread, but have not been able to locate it again. The title is The Plight of the Jews in the Eastern War Zone. It urged America NOT to go to war against Germany because Germany and Austria-Hungary were the Jews' only protectors in Eastern Europe. It would not surprise me in the least to find out that Jews were proportionately better represented in the German Imperial army and government than in any other nation's.
One reason the Nazis never played up the circumstances surrounding Hitler's award of the Iron Cross, First Class, is that the regimental adjutant who submitted the recommendation, was Jewish.