It’s one of the thorniest stories in the Bible—when Abraham took his son Isaac to be sacrificed on Mount Moriah. How could God demand filicide as proof of faith? This week on “Parsha in Progress,” writer Abigail Pogrebin (author of My Jewish Year) and Rabbi Dov Linzer (head of Yeshivat Chovevei Torah) take on the Binding of Isaac and how it tests us even now.