To this day, one of the key core issues of the Muslims versus Jews conflict is the basic misunderstanding of who Abraham was told by God to sacrifice at mount Moriah (the modern day Dome of the rock in Jerusalem).
Was it Issac or Ishmael?
Jews believe it was Issac who founded the twelve tribes of Israel. Muslims believe it was Ishmael who founded the twelve tribes of the Arab world.
One is right and one is wrong. Who is it?