"Racial cleansing" in German universities took part in 1935, the "Final solution" (started in 1942) was unthinkable at the time, and the immediate consequences of the "cleansing" was that "just" "some people were not being able to give lectures", but that policy alone had indeed been detrimental for science in Germany. We have payed the price for those lessons, and have the right to learn from them.