The main Abrahamic religions are Judaism , Christianity and Islam. All three are based at least partly on the Old Testament and interpretations of it, and adherents claim to worship the god of Abraham. In turn, Zoroastrianism influenced all of them.
It is possible that between them they have caused more wars, pogroms, crusades and generalized killing than any other school of thought. The only thing they can agree on is that they hate atheists and possibly Scientologists. (But they may have a point with the Scientologists.)