According to this:

The man who confessed to killing Dutch anti-immigration politician Pim Fortuyn told a panel of judges Thursday that he acted out of concern for the country's Muslim minority.

Van der Graaf said he followed Fortuyn's career as a columnist for a popular national magazine and was concerned he was using "the weak parts of society to score points" and gain political power.

Muslims in the Netherlands were being used as "scapegoats," he said.

Thanks for your concern.