France has over had over a thousand terror attacks since 2000. Even if their numbers of imports are lower, the quality of the imports are worse. You'll notice that Australia doesn't have a child-rape gang crisis like England. France imports terrorists, the British import pedophiles, and Australia imports Chinese shop-keeps. Hence, though their numbers are worse, the severity of the problem is not as extreme.

Thomas Sowell tried to explain this in autistic detail in "Immigration And Cultures", because when and where you import immigrants from is more important than raw numbers. Raw numbers just magnifies the problem (or benefit).