Islam has probably a billion and a half adherents today. And it is probably the most compelling spiritual and moral force on earth today.
People hate to hear that.
There is no doubting it, Islam is a rather unique phenomenon in History. It motivated the Arabs to build a hugely successful civilisation which spread with an energy never before seen on Earth. A civilisation which was to give birth to many of today's sciences and to provide great advances the existing sciences. From the middle of the desert came a religion that inspired a civilisation that led the world for well over a thousand years. In relatively recent times its spread has become truly global with Muslim communities living in practically every country in the world.