I do agree that Zwarte Piet is racist, and needs to change, the question is how. And how to make the Dutch in general understand the very necessity of this change.
What is most important to realise with how much (positive) sentiment Sinterklaas and Zwarte Piet are valued by the main public. Almost everybody loves them deeply (and I do too), their roots lie so deep in Dutch culture and tradition, that every attack on them is being felt as an attack on Dutch identity and culture.

Second, one must realise that Zwarte Piet is seen as a positive figure. A role model so to speak, who is fun, and friendly. Sinterklaas is often seen as the strict, and slightly scary old man, where Zwarte Piet is much easier to associate with for kids. This makes it extremely hard for Dutch people to see the relation with racism. People who aren’t (intentionally) racist, and don’t see themselves as racist, and often have a positive image of black people do not like to be called racist. And rightly so, because they aren’t really. They just honestly don’t realise they are being racist (which is often hard to notice of yourself anyway).

There are also a lot of children who don’t associate Zwarte Piet with a black person at all. I for one never did. The first time I realised there might be a connection was when I was about 12, and saw a discussion about the subject on TV, and even then I was pretty confused about why black people would feel offended, because surely Zwarte Piet wasn’t a black person at all, it was just soot from the chimneys.
What I want to demonstrate with this example of my own experience is how incredibly hard it is to see how people can feel offended by something you only see (for as long as you remember) as something extremely positive, that you look up to.

However, the caricature of the ‘Morish’ black man with rings in his ears and big red lips IS racist. It is not intended that way, but it is. And it does hurt people, so it needs to change. Zwarte Piet cannot be banned, or completely changed at once. That’s like banning Christmas trees, or replacing them with ferns or something. It’s also disrespectful towards the tradition. So I think change needs to happen gradually.

Maybe we can start by replacing the entirely black faces with some soot in the first year, but keeping the wigs and red lips. The next year the hair could be changed to different, fun colours as well. A year later there can be subtle experiments with other things as well. There are amazing possibilities for the make up. Piets could become more varied and fun even. But the main point is that every change has to be very subtle, cause people have to adjust to it. Also the kids shouldn’t notice that Zwarte piet suddenly is completely different. Cause in the end, it is about the kids. Societies don’t change overnight, and people in general don’t like changes, especially to things that are Sacred to them, and Sinterklaas and Piet are sacred.

If the changes are subtle, and gradually enough, people won’t even notice them, and get used to it without a feeling of loss. If the government makes sure those subtle changes are made each year during the Arrival of Sinterklaas and in schools (perhaps malls as well, although I don’t know how that’s organised), the rest will follow. And in 10 or 20 years the Dutch will be laughing about their silly, and bizarre racist depiction of Piet from the past.

Or so I hope.

Dit zijn beide subjectieve aannames van uw kant. De feiten zeggen echter het tegendeel. Breivik heeft zijn stellingen onderbouwd met feiten; u schiet in een links reflex met loze beweringen zonder onderbouwing. U bent een stereotyp cultureel-marxist.