Clearly, in the context of the Netherlands (I don’t know about the EU at large), he should be advocating removing religious privileges (proactive, State sponsorship) for ALL religions.

In effect, he should instead advocate for an American style 1st Amendment with the freedom to privately practice your religion, and the explicit removal of ALL State support. That would at least rid them of State-bankrolled Madrasas that suborn the overthrow of their way of life.