Hmm.. looking through what data the German resident register stores[1] there's not too much information I would deem too personal, apart from the religious affiliation maybe. They certainly don't track race as you wrote in your previous post.

[1] https://de.wikipedia.org/wiki/Melderegister#Inhalt

I gather you're from a country without a resident register?

EDIT: Also you shouldn't mix up the content of a resident register with the information you find on a public ID card. The information printed on those is a lot more limited.