Are you kidding me? Of course, they found jews people in all the invaded countries and Germany, but they had a harder time finding jewish people. In the Netherlands, they basically knew who were jewish, and if the data had not been destroyed, 100% of the jewish people have had died because of it. Without the data, some people had the chance to escape or hide their true identify (there are plenty of jewish who could convince law officers that they were in fact not jewish). With that information, they had absolutely no chance

My point was that the data was not the cause of the genocide. If you look at modern genocides eg. Rwanda a few years ago or Southern Sudan as we speak they are mostly characterised by a lack of internet connectivity or data about people. The places where everyone is on Facebook and G+ are not where they happen. Indeed in the Sudan case if there was a lack of privacy about who exactly had slaughtered who's family I suspect it would make the perpetrators much less likely to do it.

No one said the data was the cause of the genocide.

It is important enough to the Germans that your data (I.e. that required for your identity card) has strict rules concerning a central storage system.

The system works per state, hence if I move from one state to another than my data has to be moved from one state to the next.

I have a friend that works on this system that moves this data over web services.