Along with this sociological and demographic research, we also must not forget that Europe has not become acquainted with Islam only recently, but that Islam is actually an inseparable part of Europe.
Europe and the realm of Islam have had close relations with each other for centuries. First, the state of Andalusia (756-1492) on the Iberian Peninsula, and later the Crusades (1095-1291) and the Ottoman capture of the Balkans (1389), brought about a constant interrelation between the two societies. Many historians and sociologists assert today that Islam was the leading cause of Europe's movement from the darkness of its Middle Ages to the brilliance of its Renaissance. At a time when Europe was backward in medicine, astronomy, mathematics, and many other fields, Muslims possessed a vast treasure of knowledge and great possibilities of development.
Islam in America
Islam in Malaysia and Indonesia
Islam in Africa and Spain