The problem is when it's pretty clear that it's meant against the religious and other kinds are just putin there to make it seem more "neutral". That was the way things happened in Denmark, where we've had the law for a year. When right wing parties talked about it, they didn't even hide that it was meant against the muslims and some exceptions shows the same. Can't say if it is the same in the Netherlands, but here it was a more or less completely symbolic action against islam (especially considering how only very few wear the banned headwear)