Not Muslims, but we have a great flow of Colombians, Venezuelans and Haitians in the country for 4 or 3 years. Basically the political system brought them with the excuse of a humanitarian aid, but in reality they are cheap labor force capable of performing high risk jobs requiring little specialization for miserable salaries.
My theory is that now the oligarchy is developing an armed arm of hitmen and cheap muscle capable of protecting their interests in the inner power play.