refuting this suspicion
the “illiterate” is the one that is unable to read or write, and this is something that doesn’t insult the prophet but it is a strong proof that the holy quran is sent to him by allah.
he didn’t read it from other books, but it was an inspiration to him from allah:
“and they say: "tales of the ancients, which he has written down, and they are dictated to him morning and afternoon." say: "it (this qur'an) has been sent down by him (allah) (the real lord of the heavens and earth) who knows the secret of the heavens and the earth. truly, he is oft-forgiving, most merciful." “ ( al furqa : 5-6)
so how could an illiterate man receipt such eloquent words, challenging by that the arab polytheists that were known by their eloquent and skillful language and couldn’t say even a single verse similar like that in the holy quran.
some jews in addition to that say that the prophet isn’t a jew but from another nation, so he couldn’t be the last chosen prophet by allah, because they consider themselves as being the best and greatest nation chosen by allah to carry all his messages.
first we have to say to those jews that the prophet’s message is for the whole world and is treating all kinds of people equal, as said in the holy quran:
“o mankind! we have created you from a male and a female, and made you into nations and tribes, that you may know one another. verily, the most honorable of you with allah is that (believer) who has at-taqwa [i.e. one of the muttaqun (pious)]. verily, allah is all-knowing, all-aware." ( al hujurat: 13)
so being different is not to make one nation superior to the others, but to make all people know each other; and those who are given priority by allah are the most believing in him and following his teachings.
second, the jews have to know that sending the most number of messengers to them, is not because of being better than others, in the contrary, it is because of their bad attitudes, insulting and killing the messengers sent to them.