I dont want people to think I am German, Autistic or Pedantic but the question posed was ... Am I German or Autistic? not Am I German or Autistic or Non-German or Non-Autistic?
Obviously the title is cheeky as a lot of attributes ascribed to Autistic people are also stereotypes about Germans.
The site is exposing the reality that you can come to the same place from different directions. For example, if you are more "German", your sense of fairness, adherence to rules, regard for punctuality comes from a place of moral obligation. You act in ways you hope others will also act because you believe that if everyone acts that way, we'd all get along better.
However, if you do these things because those are the arbitrary rules set forth and they must be followed because that's the definition of a rule, something you follow, then you're likely Autistic because that kind of rigid thinking that is a hallmark of the condition.
You are 60% non-German and 60% non-Autistic.