As someone who lives in Germany for quite some time, believe me, Americans are a problem here too. Smile in your face and drown you in over-politeness while stabbing you in the back.
For the record, it was an anecdote about people from different cultures not understanding each other. It was not intended to be a criticism of Asians. It absolutely wasn't intended to blame Asians for the misunderstanding.
It is the routine norm with social issues to look to pin the blame on one party. That seems to be the default mental model for any social problem.
It is usually not the best explanation and it actively causes all kinds of problems. I like to give push back against this common assumption wherever possible.
Gotta love the straight German way.