Growing up with Sinterklaas or participating in Sinterklaas doesn't automatically make racist little children or parents. It is a long outdated tradition and something definitely needs to change, but as a kid, and also as a parent it's about the presents for kids. That doesn't excuse the unwillingness to adapt to a growing multicultural society.
This country is unfortunately struggling with the same movement that got Trump elected though, and we have a politician with the same ideologies.
Sorry didn't mean to call racially insensitive parents who just want to have a good old racially insensitive time, racists. My bad.