When up to a dozen world leaders and roughly 1.5 million people gathered in Paris on Jan. 11 to mourn the murder of 10 editors and cartoonists of the satirical newspaper Charlie Hebdo and seven other people by three French-born Islamic radicals, they wanted to demonstrate that Europe will always embrace liberal and tolerant values.

But the more telling event may turn out to be a counter-rally that took place at a 17th-century town hall in Beaucaire, France, that was led by Marine Le Pen, the leader of the far-right National Front. In Beaucaire, the crowd ended Le Pen's rally by singing the French national anthem and chanting, "This is our home."

Le Pen is at the forefront of a European-wide nationalist resurgence — one that wants to evict from their homelands people they view as Muslim subversives. She and other far-right nationalists are seizing on some legitimate worries about Islamic militancy — 10,000 soldiers are now deployed in France as a safety measure — in order to label all Muslims as hostile to traditional European cultural and religious values. Le Pen herself has likened their presence to the Nazi occupation of France.