This month's murders in Paris have caused an upheaval in how the non-Muslim world views its Muslim citizens in Europe and the United States. This presents a bigger and more urgent problem than what the Muslims think about us, even when they kill us.
Their presence is the source of the crisis both the immigrants and European society now experience, which is religious and cultural, and for that reason ultimately political and powerfully resistant to resolution. Not only for individuals, but for whole communities.
The Europeans had been glad to recruit post-1945 laborers but thought they would go "home" when Europe was ready to dispense with them. However, the immigrants had found their new home, uncomfortable as it may have been, in Europe. Thus has the crisis slowly developed.