Europe used to celebrate their heritage of going off to be foreign fighters in the Levant - they called it "The Crusades."

There was major civil war and unrest when those fighters returned as well. Radical Christians were far more disruptive than radical Muslims have been to date.

But then as now, the real problem was not that people went off to fight for religiously motivated causes, nor that they returned with military skills and a global perspective. The problems stemmed from the perceived state of governance they returned to and an enhanced determination not to put up with it any more.

A very similar effect occurred in the US with the African American population after WWII.

Europe is evolving culturally, and no amount of neo Nazism is going to change that fact. Many emigrants perceive themselves discriminated against, Muslims in particular, and no amount of rationalization by those who consider themselves true citizens is going to change that.

Ten years? Only if the people and governments get serious about addressing perceived discrimination and accept the fact that once again, Europe is in an era of major cultural evolution.

Blaming those calling for radical action is natural, but it is little different than blaming the civil rights movement in the US on men like Dr. King and Malcolm X. They just "saw a parade and leapt in front. We need to think more honestly about why these types of "parades" form