It couldn't be said better than "Light of Reason" blog of Arthur Silber:
CRAP

You can’t try to change the administration’s course by appealing to facts and argument: they’ve rejected facts and argument, on principle.

Most people seem not to understand that when we deal with the Bush administration, we are dealing with something unique, and uniquely dangerous: an administration which is fully committed to an ideology—an ideology that is entirely self-contained and completely self-referencing. It is not concerned with facts, evidence, logic and argument. It is concerned only with its own internal vision of the world, and how that world should be constructed and how it should operate.

So even if there are many utterly compelling arguments against the Bolton appointment, or against attacking Iran, none of that matters.