Muhammad is sometimes portrayed as being a muslim all his life. Or at least living by muslim standards all of his life. Is that really the case? Let’s look into it. Muhammad was believed to be around 40 years old when being called to his prophethood .
Muhammad had zero faith in Allah
According to the quran, Muhammad had zero faith in Allah before his revelations started.
And likewise, we reveal to you a spirit from our command. You did not know of what is the book nor the faith. But we made it light; we guide by it whom we will of our servants. And surely you will guide to a straight way Sura 42:52
Muhammad was an infidel (kafir)
See it? He did not know of the faith. He knew nothing whatsoever. None. Nothing. Nada. And what do you call a person that has zero faith in Allah? There is a special word in arabic for that. A kafir.
Kafir (Arabic: كافر kāfir, plural كفّار kuffār) is an Arabic terms used in an Islamic doctrinal sense, usually translated as “unbeliever,” “disbeliever,” or “infidel.” The term refers to a person who rejects or disbelieves in the god of islam or who hides, denies, or pays no attention to the Islamic version of truth.
Muhammad was a kafir for 40 years. If we consider Muhammad’s age when he died at age 62 , that gives us 22 years as a prophet, and 40 years as a kafir.
So, there you have it. Muhammad lived two third of his life as a kafir!
Islam is false. Allah is a fabricated god made up by a false prophet.
 Muir (1861). Life of Mahomet 2. p. 55.
 The Last Prophet, page 3. By Lewis Lord of U.S. News & World Report. 7 April 2008.