God and His Demons by Michael Parenti.
From the publisher's description:
Noted author and activist Michael Parenti brings his critical acumen and rhetorical skills to bear on the dark side of religion, from the many evils committed in the name of “holy causes” throughout history to the vast hypocrisies of its unworthy advocates past and present. Unlike some recent popular works by stridently outspoken atheists, this is not a blanket condemnation of all believers. Rather Parenti’s focus is the heartless exploitation of faithful followers by those in power, as well as sectarian intolerance, the violence against heretics and nonbelievers, and the reactionary political and economic collusion that has often prevailed between the upper echelons of church and state.Here are some related references & links:
Land of Idols: Political Mythology in America. New York: St. Martin's Press, 1994. Chapter 2: The New Age Mythology; pp. 15-25, 175-177.
Friendly Feudalism: The Tibet Myth. July 2004.
Michael Parenti Political Archive