I've confronted people wearing 'Che' t-shirts and Nazi symbols on their clothes, telling them I think it's idiotic to wear that. If Islam is just another fascist ideology and the headscarf is it's symbol then shouldn't we speak to wearers of that just like we would to people wearing swastikas?
(Of course in part the answer depends on whether you believe in the current good islam / bad islam segmentation that our leaders are supporting) (Did some people think there were "good Nazis" in 1935? Probably not a fair comparison because the Nazis were a monolithic cult with a single charismatic leader. Islam, at this time, is not.)