In the case of Christianity, we know that in fact for a long time (at least in Germany) by the life work of Karlheinz Deschner. But Christopher Hitchens is living in the US English, and there seems to have found this Erkenntis only in recent years trailer.
However, he does not stick with a religion, but also shows in the chapter on Islam (the dissemination of the Word of God by an angel to a illiterate businessman in the desert), existing anywhere in the world downsides of this religion on. Another chapter is gewidment Eastern religions, which he also considered unsuitable for ethical conduct exposes (conflict between Hindus, Muslims and Buddhists in India or Sri Lanka, role of Buddhism in Japan imperialist politics in the last century). Here at last he brings facets, which are absent in the other currently popular religious critics.
The book is liquid to read, and the reasoning is less polemic than Dawkins or Harris. Nevertheless, the book is the dogmatic believers of any religion drive the Zornesröte the face, because the author speaks mercilessly to relativize many soft-focus pseudo critics looking and euphemistically describe what: All religions disqualify himself as an ethical basis for a vernünfitiges together in this day and age. May be, if found in the Bible or the Koran as "good" (which is picked always an example), so it is as much inhuman nonsense that simplifies you do not take these written for nomadic pastoral peoples of the Iron Age tribal rules to guide its present action can.