From Karen Armstrong’s A History of God: The 4,000-Year Quest of Judaism, Christianity and Islam:

The problem of predestination and free will … indicates a central difficulty in the idea of a personal God.  An impersonal God, such as Brahman, can more easily be said to exist beyond “good” and “evil,” which are regarded as masks of the inscrutable divinity.  But a God who is in some mysterious way a person and who takes an active part in human history lays himself open to criticism.  It is all too easy to make this “God” a larger-than-life tyrant or judge and make “him” fulfill our expectations.  We can turn “God” into a Republican or a socialist, a racist or a revolutionary according to our personal views.