maybe clearing this up: germany has a hereditary citizenship. i. e. children of germans can get a german passport.

being “german” means owning german citizenship (or citizenship of the one of the former constructs the federal republic sees as its precursors), not owning a set of genes. you can have no ‘distinct european genes’ (e.g. be ainu?) at all and get citizenship for your kids, as long as you have it. you can be “genetically german” and still don’t have a passport.

jus sanguinis usually isn’t genetically defined