Comment by magicalhippo

It wasn't a list of Jews, it was a list of everyone from which Jews could be easily identified.

The distinction is important in this context, since the purpose of collecting and keeping the data wasn't specifically to have a list of Jews handy.

This is relevant to data collected by companies and governments today.

Consider a list of children with their parent names and the parents' preferred pronouns. You don't have a list of gays, but you have a list from which gays can be readily identified with high accuracy.