Deutsche Welle has the most detailed account that I’ve seen in any professional media source. Some excerpts:
Wilders is charged with five counts of offending and inciting hatred against Muslims and groups of non-Western origin, particularly Moroccans….
He has likened Islam to fascism and made comparisons between the Muslim holy book, the Koran, and Hitler’s “Mein Kampf”….
The specific charges against the parliamentarian stem from comments made in his campaign “Stop the Islamization of the Netherlands”. Wilders could face a 7,600-euro ($10,300) fine or up to a year in jail if found guilty.