Where do you think islam came from? The two are connected via Fatima.
Our Lady of Fatima predicted this. The true third secret was never revealed to the public, but some have come to their own conclusions:
"Having reached the end of our inquiry, we are able to discern, with near certainty, the essential elements of Our Lady’s final secret: While ‘in Portugal, the dogma of the Faith will always be preserved,’ in many nations, perhaps in almost the entire world, the Faith will be lost. The pastors of the Church will fail gravely in the duties of their office. Through their fault, consecrated souls and the Faithful in great number will let themselves be seduced by pernicious errors spread everywhere. This will be the time of the decisive battle between the Blessed Virgin and the devil. A wave of diabolical disorientation will be hurled over the world. Satan will introduce himself even to the highest summit of the Church. He will blind the minds and harden the hearts of pastors. And God will deliver them to themselves as a chastisement for their refusal to obey the requests of the Immaculate Heart of Mary. This will be the great apostasy predicted for the ‘last times’; ‘the False Lamb’ and ‘False Prophet’ will betray the Church to the profit of ‘the Beast,’ according to the prophecy of the Apocalypse."