Abraham in the Qur'an and the Bible D. ISHAQ OR ISMAIL: THE MUSLIM DILEMMA . 1. Ishmael: The Sacrificial Son in Islam . It is most unlikely that a Christian will be able to speak to Muslims directly of Isaac as the son whom God called on Abraham to sacrifice without some reaction from them. Virtually every Muslim will interject that it was Ishmael and that the attempted sacrifice took place at ...