There have been loads of refutations of many parts; I don't have a full review at the ready and can't be bothered to research it again in-depth for just this comment to be honest :-)

Hitchens not infrequently exaggerated some alleged crimes or misconduct from religious figures unfortunately. He usually had it by the right end of the stick in the general view IMHO, but could be sloppy on details. Classic case of "say something with enough confidence and people will believe you, especially if it confirms their preconceived notion" (in this case, religion=bad).