In France, Muslims make up 60% of all prison inmates, while being only 12% of the total population

Similarly, 7 out of 10 burglaries, assaults, and violent thefts in France are committed by first- or second-generation immigrants. Most of these perpetrators seem to be Muslim, although a third of them may be West Indians, Africans, and Roma of nominally Christian background. Muslims seem to be especially over-represented in serious violent crimes that lead to prison sentences. Similar trends are developing elsewhere. Muslims make up 70% all prison inmates in Spain and 45% in Belgium. A Danish researcher has studied the relationship between criminality and immigrant origin in Denmark, Norway, and Finland. He found that the prevalence of Islam in the immigrants’ home country was the single best predictor of criminality both for “all crime” and for “violent crime,” being better than the home country’s mean IQ or GDP per capita and much better than its murder rate.