In Hitchens' defense, I've never quite understood why the Western Left gives Islamism a pass that it isn't willing to give to fundamentalist Christianity, when the former results in terrorism and international wars killing tens of thousands, while the latter has at worst been responsible for stricter abortion laws and aided and abetted right-wing economics. On the face of it, even mainstream "moderate" Islam ought to be utterly abhorrent to anyone who considers themselves a good liberal, but none will offer even a mild critique of it for fear of seeming uncultured and insufficiently cosmopolitan.
much of the ideological basis for the US-led invasion of Iraq was Dominionist-Christian, and said invasion was the greatest single act of terror unleashed upon the world since Vietnam/Indochina.
If by Dominionists you mean Christian Reconstructionists, they were generally very opposed to the War in Iraq.