You assume that I don't know whereof I speak.
Muslims are the descendents of Ishmael, while Jews are descendents of Isaac. Both are sons of Abraham but to different women. Isaac was the son promised to Abraham and Sarah but they were impatient with God and as they grew old they doubted that his promise would be fulfilled. So Sarah gave her maid-servant Hagar to Abraham and she bore his first son. Although Ishmael was his eldest son Sarah became pregnant at a very advanced age with Isaac, the child promised by God who was given Abraham's inheritance. This is what started the "family feud" between the Arabs and Jews. Abraham was promised that his seed would be numerous and he would be the father of nations. In fact, he was the father of two nations that have been warring with each other ever since.