In this case, they're somewhat justified in at least being afraid. The multicultural gurus have refused to accept the fact that different cultures are sometimes--if not usually--incompatible. Case in point: there are several prominent (quite likely a LOT more) radical Muslim clerics who want jihad and the conversion of Europe. And Islam is, by nature, an imperialist religion that has never drawn distinctions between religion and politics. Oriana Fallaci is right: Europe is selling its soul "like a prostitute."
While I'm not a fan of Le Pen or of the BNP, I do wonder if Europe's only hope lies in their electoral success in the near future.