I have to admit that I just wonder why you compare apples and oranges. I think the Muslim youth that is involved in burning cars and throwing stones in France are third generation immigrants at the most. Am I wrong in that assumption?

Blacks were never immigrants to the US, they were slaves. Aside from newly immigrating blacks from the carribean and the very new and few immigrants from African countries today, I would say there are no black immigrants in the US to which you could compare the immigrant population in France. You think I am wrong?