It's freedom of speech. Something Islamic apologists have a complicated relationship to.
The same freedom of speech that allows me to call Wilders an islamophobe, a fascist and a brownshirt. I agree.
Hence all the calls in this thread for Wilders to be imprisoned for what he did.
Oh, wait.
Indeed. No one's arguing for that.
There's another thing he might be prosecuted and convicted for, though. In March, there were municipal elections in the Netherlands. On election night, he asked at a meeting (with only party sympathisers (1)) three questions to the crowd:
- do you want more or less EU?
- do you want more or less Labour Party?
- and after saying people might file complaints, and liberal prosecutors might be licking their lips at the prospect,
this third question.
There was a general outcry that Wilders had gone "a step too far". Various people have made the comparison with Goebbels' Sportpalast speech - especially in the German press. Many people have indeed filed police complaints, in fact, ostentatiously a couple of complete city councils have done so.
Wilders has defended himself saying he only meant
criminal Moroccans (2), and that his party had three planks to do so:
(a) retract Dutch citizenship from convicted felons with dual Dutch/Moroccan citizenship;
(b) limit immigration from Morocco and other majority-Muslim countries;
(c) encourage "return home".
This is obviously a lie as only (a) targets criminals specifically.
In the couple of days after that, 2 MPs defected, 1 MEP defected and another said they would not be re-electable, and a couple of provincial councillors defected, some giving up their seat and others continuing as independents. However, collapse of his party did not happen.
I don't think that Wilders has done something really new here. People who didn't know he thought this way must have been living under a rock. But hey, if it's a valid reason to try him under Dutch hate speech laws, fine with me.
(1) You can't call them members because Wilders is the only member of his party. Democracy for you in action.

(2) It is a fact that people of Moroccan ancestry, especially male young ones, are overrepresented in crime statistics.