As was mentioned most of the Jews of Germany were highly assimilated, and one reason that many did not leave Germany before leaving was too difficult was they had a hard time believing that German Kultur could treat other Germans in such a way. Was there anti-Semitism in Germany, of course, and prior to the Nazis probably about average for the western world including the USA - Henry Ford's "The International Jew" published in the early 20's was as vicious as anything the Nazis printed and his Dearborn Independent newspaper was not far from Julius Streicher's Die Stürmer. Jews were generally excluded from higher social circles, and while present throughout academia had difficulty progressing in certain faculties. Likewise Jewish doctors could not get privileges at certain hospitals (something that was happening in the USA until the 50's-early 60's).
While Jew baiting helped the Nazis get in to power by pandering to certain elements, their treatment of the Jews even before the huge expenditure of effort to create the death camps, transport people there, and run them, was highly detrimental to their war effort. IMHO while a renewed monarchy of some generic right wing or fascist government might re-institute official quotas for Jews at universities etc, it is unlikely that ghettoization and other extreme measures, let alone extermination would happen (look at Italy/Mussolini, Hungary/Horthy before being leaned on by Hitler for examples). Most German Jews (500K out of 67 mil population) in 1933 were German patriots and would have been useful at all levels to a rebuilding Germany - not just the physicists but doctors, engineers, and young men who could be common soldiers and factory workers...