Navy Joe, until 1933 German Jews were some of the most patriotic Germans around, heavily into Germanic names like Siegfried etc. Which is why many of them didn't take Hitler serious at the beginning, it was something that would pass as usual, no reason to leave their country for.
Best summarized in the following joke from 1933: Two German Jews are running from the pursuing Nazis and barely make it over the Dutch border. Two Dutch custom officials pick them up and slowly walk them to their border post. Says the one Jew to the other: "Look how slovenly they walk, nothing like our SS".
F 135 - the right choice