It conjured up an amusing image and I thought I would share. It has nothing to do with him being Dutch or not Dutch. Sheez.
That aside, there's a difference between going "Hah you're a foreigner and you don't speak good" and running away versus making a lighthearted joke you know the person themselves will understand. And by the way I got plenty of the latter when I was visiting Germany a couple months ago, as well as on the plane ride back home speaking spanish with the Spanish tourist next to me, as well as every time I've ever stayed at a hostel. Sooner or later, you use a funny false cognate or something (such as embarazado in Spanish means pregnant, not embarrased), and quite a few people inevitably do pregnant pantomimes and giggle and explain it to you if necessary, etc.
And somehow, neither does the world end nor does it spark international diplomatic incidents. In fact, it's usually a good ice breaker.