A question re Geert Wilders' trial

I am not that familiar with Wilders, his life and his beliefs. Here goes a selection of posts and articles by Solomon of Solomonia.

So I am not going to have an opinion about the trial and the man. People who are putting Wilders on trial could have found a loophole in the famous Dutch freedom of speech, besides Wilders could be a bigot and a hatemonger for all I know.

However, if one of the Widers' sins is comparing Koran to Adolf Hitler’s Mein Kampf, when do the Dutch folks intend to prosecute their own Muslim folks that lately are mostly seen running around with "Zionism = Nazism" placards and stuff like this?

Just asking, like...