IBM used the same excuse?
I read that book. From cover to cover. And as far as I could see, from the facts recounted in that book, IBM had taken every step in its power to prevent misuse of their technology by the Nazis. As a private company, they couldn't blow up their factories in Germany, particularly before the war started.
The only thing that could be criticized in IBM's conduct was that it took steps to avoid an association between punched cards and the Holocaust, due to the illegal unlicensed misuse of IBM's punched card technology by the Nazis, from entering the public mind - they covered up the historical record of some events that were not under their control to prevent damage to their brand image.
Every step of the way, they withdrew their technology from Germany to the extent they were able, and they contributed to the Allied war effort as a public-spirited business.