Inquisition : by Michael Baigent and Richard Leigh.

The history of church is replete with murders and massacres, of those that in any way threatened its hold of total power, either with independent will or with knowledge of any realms at all whether intellect or mind or thought or discoveries of the universe, and all the more so about anything spiritual.

Massacres of Cathars and murders of Merovingians, inquisition resulting in burning of people branded merely for the reason of not being completely subservient, including thinkers and those with any knowledge - all that is assumed gone, to be forgotten.

The writers of this work point at the obvious, with the papal infallibility being made into a doctrine in 1870 the whole thing is kept alive at a level where it can be brought to physical tortures and burning of infidels any time and place where the level of power suits such an event from not being rightly interpreted into evil that all this has been.

That all this is no different from the taliban etc. terrorism that they call jihad, or from the KGB era of Siberian gulags for huge numbers of those that were suspected of not being loyal, or from the fascists and nazis and their genocides, can be seen clearly unless one is already blinkered by bringing up or some other reason (personal gain or power is generally a strong motive) blinkered or blinded, or pretending to be so.