All countries, all societies have their own attitudes towards foreigners, we Dutch are not worse or better than others in this regard. In fact I can name a few worse places to be in Europe, but I digress..
The thing to understand of our Dutch culture is this, and understanding this will save you a lot of frustration and misunderstanding: as Dutch we have somehow actually come to believe that we are an open and tolerant, non-racist society. That's how we present ourselves and that's how we interact with others, whether they agree or not. (I think you can see a bit of that in this discussion).
If you understand this as a foreigner, you will have a great time in the Netherlands. You just need a bit of patience and understanding sometimes when you hit that wall of tolerance. So if you are young and open of mind, do not let yourself be discouraged by what is written here. Use it to your advantage.