Only for people you disagree with. There are way too many people of all political and philosophical pursuasions that write what they don't know about, but how do you know they don't know about it if you don't know about it either? And how do you know you know about something; maybe you just *think* you know. It all comes down to whether you agree with it or not.
Well, this topic is something I happen to know something about and, believe me, Hitchens doesn't know. I happen to be a Christian believer and Hitchens obviously is not, and that might skew both of us, but I can unskew myself for a second and say with confidence, he still doesn't know.
I've always found it interesting that there are various obscure texts that surface and purport to be the "true teachings of Jesus," just as there are all kinds of groups that claim to have the "true teachings of Jesus," (Moonies, Muslims, Mormons, even a Hare Krishna that I ran into in the Appalachian mountains), and people lap it up, but to claim that the historic church and its scriptures, that go back to the time of Jesus' apostles, actually have the true teachings of Jesus, well, that just isn't possible.