The fallacy of Muhammad's illiteracy
That stupidity of Muslim comes out of understanding/misunderstanding of these verses from Quran
007.157: Those who follow the Messenger-Prophet, the Ummi, whom they find written down with them in the Taurat and the Injeel (who) enjoins them good and forbids them evil, and makes lawful to them the good things and makes unlawful to them impure things, and removes from them their burden and the shackles which were upon them; so (as for) those who believe in him and honor him and help him, and follow the light which has been sent down with him, these it is that are the successful.
007.158: Say: O people! surely I am the Messenger of Allah to you all, of Him Whose is the kingdom of the heavens and the earth there is no god but He; He brings to life and causes to die therefore believe in Allah and His messenger, the Ummi Prophet who believes in Allah and His words, and follow him so that you may walk in the right way.
That is NOT "The fallacy of Muhammad's illiteracy", To believe those verses literally one must be a STUPID . So
"it is the stupidity coupled to the illiteracy of Muslims" makes that Muhammad's illiteracy a fallacy