Abrahamic Faith consists of Judaism, Christianity and Islam. These religions have something in common such as the belief of Adam is the first man created and the ancestor of all human beings, Abraham as a prophet, and the Torat as a revelation of God. Nevertheless there are also some significance differences among them.
Judaism is a tribal religion that can only confessed by a Jew tribe. This religion could not be spread to Non Jew. That is why the number of its follower is only a few. Around 14 million people in the world. Meanwhile the Christianity and Islam are spreading to all people in the world and confessed by billions of people.