Pre-WW2 census in Germany was conducted by IBM and included religion and other family origin related questions.

Fast forward a few years and the Nazi regime used census results to go after every family that was undesirable for them using the census data they bought from IBM.

Privacy and anonymity are not needed until they are desperately required.

This can be read as if IBM did this unknowingly and only before WW2.

But IBM knew what they were assisting with, and even pre-WW2 was already assisting the Nazi regime of 1933-1939. And they didn't stop come WW2, if anything IBM opened new subsidiaries and continued throughout the second world war.

"(...) IBM leased, rather than sold, its machines. The company retained control of punch-card supply and provided service through subsidiaries. Each set of cards was custom-designed to Nazi requirements. He later wrote that the IBM headquarters in New York oversaw these arrangements through subsidiaries across Europe"

"(...) IBM New York created a subsidiary in Poland, Watson Business Machines, after the 1939 invasion. The firm managed railway traffic in the General Government and ran a punch-card printing shop near the Warsaw Ghetto. He stated that this subsidiary reported through Geneva to IBM New York, and revenues were transferred accordingly."

https://en.wikipedia.org/wiki/IBM_and_the_Holocaust

I think the bigger issue is allowing such corruption to split and divide people. Religion can often be hidden, but if the Nazi regime decided to depict people with ginger hair as being evil/undesirable, then the census wouldn't have even been relevant.