Original: Islam is the second largest religion after Christianity in many European countries , and is slowly catching up to that status in the Americas , with between 2,454,000 , according to Pew Forum , and approximately 7 million Muslims , according to the Council on American-Islamic Relations ( CAIR ) , in the United States .
Simplified: Islam is the second largest religion after Christianity in many European countries , and is slowly catching up to that status in the Americas .