A politician in the Netherlands got a crowd chanting "Do you want more or fewer Moroccans?" "Fewer! Fewer! Fewer!" [0].

A court found him guilty for "groepsbelediging", insulting a part of society, which is a crime. He did not get a punishment.

That's the only example that comes to my mind of something that the courts found not allowed in the Netherlands.

[0]: https://www.youtube.com/watch?v=BaB75uznT8o