For German Right of Return law details, see Article 116 of the Basic Law for the Federal Republic of Germany. It specifically lists "German ethnic origin" as one of the requirements. And Germany isn't unique. Similar laws exist in many Western nations. Why do you suppose no one ever hears about it, while Israel's "racist" Law of Return doesn't get off the news pages? What do you think is the reason for that?
Two girls killed in head-on collision in Israel's north (Haaretz)
from the article: Zionism is not an ideology