Germany's naturalization rate is not out of the ordinary for the EU, either per capita or per number of foreign residents. Italy, Belgium, Spain and others "hand out more passports" relative to their own population than Germany; Poland, Ireland, the Netherlands and others "hand out more passports" relative to the amount of refugees that live in their countries. Germany is very much middle of the road. So, you know, whatever.
https://ec.europa.eu/eurostat/documents/7870049/24010214/KS-...