Muhammad got four historical facts wrong and therefore could not be a prophet:
1) He claims Miriam, the sister of Moshe was the mother of Yeshki (Jesus), Quran – Surahs 19:27-28, 3:35-36, 66:12;
2) he claims Haman of Megillat Esther was in the “court” of Pharaoh; confusing the Building of the Tower of Babel with Haman and Pharaoh, Quran – Surah 40:36-37;
3) and he claims that Pharaoh used the Roman method of crucifixion as a form of the death penalty, Qur’an – Surahs 7:124, 12:41, 20:71, 26:49; 38.12, 89:6-12;
4) and conflicting Islamic sources claim either Isaac or Ishmael was offered on the Altar by Avraham.
Al-Tabari, considered to be one of the premiere Islamic historians, lists the divergent views held amongst the Muslim umma (community) in regard to this very issue:
“The earliest sages of our Prophet’s nation disagree about which of Abraham’s two sons it was that he was commanded to sacrifice. Some say it was Isaac, while others say it was Ishmael. Both views are supported by statements related on the authority of the Messenger of God. If both groups of statements were equally sound, then – since they both came from the Prophet – only the Quran could serve as proof that the account naming Isaac is clearly the more truthful of the two.” (2: p. 82).