I don't see where I made that assumption. Kick out a few key faculty members and the rest of the good ones will follow, Jew or not, because they are good and h

I don't see where I made that assumption. Kick out a few key faculty members and the rest of the good ones will follow, Jew or not, because they are good and have the choice to leave. You don't need all your faculty to be Jewish in order to lose all your good ones by kicking out a single Jewish faculty member. If you lose 4/16 of your academics but all 4 of those were the Giants, then you haven't decimated your department, but you have lost what made it good in the first place. Even before the war reached the borders, German mathematics was decimated. Sometimes by numbers, but always by the numbers that mattered. Because anyone good knew someone effected, and everyone good had the option to leave.