well from a human standpoint we can all imagine how this might have happened: this guy has been living in a fish bowl, as the saying goes, so I can understand where he is coming from. However, there are a lot of 'howevers' in this situation. He needs to understand that for one thing, he is <not> a normal human being and if he wants to be, he can be our guest and let his brother Constantijn be the heir to the Dutch throne. AND he was technically on duty, as in: he is on a trip promoting his country. And then you can't say, when it doesn't suit you when you step out on the streets of your host country and you are in a bad mood and people ask you things, you just can't say: "piss off". If you do that, people will question your validity at what you are trying to do, to be.
On top of it he was enjoying some private little vacation in between, paid for by the unassuming Dutch tax payer. Borderline unethical, in my book.
This is the issue with Alexander, this is why for ages I have said Alexander (and his wife) wanted their cake, and made sure they ate it, too. I thought they had changed, I thought they had picked up some pace, learned some lessons. I thought the free-loader stage was behind this couple for the most part.
But now we are noticing that not only it isn't, but that they (or at least Alexander) are arrogant about it to boot.
From a professional standpoint: unacceptable. From a human perspective: he goofed, and we all do that sometimes. Hopefully this is another lesson for him, but let's not hold our breath on this one. Again, this is why I hope Beatrix will keep that throne warm for a loooong time.
