What is Islam? On June 5th, we begin an eye-opening perspective on Islam from Lutheran Hour Ministries. There are over 1 billion Muslims in the world, and over 7 million in America, but most Americans know very little about Islam. Looking at both the Koran and the Holy Bible, Sam Shamoun, an Arab-Christian, unveils some of the mystique surrounding this religion first preached by Muhammad in 600 AD. Islam is the fastest growing religion in the world. The Pew Research Center predicts that the number of Muslims will grow more than twice as fast as the world’s population from now until 2050.