Without going into too much detail Cohen's main point is that liberals and people on the left wing in general found themselves willing to support the continued rule of a fascist tyrant (Hussein) rather than his victims. The peace movement became a US hating movement and a propaganda tool for Saddam.
This is not to say that the book is without fault, Cohan turns a blind eye to the quagmire that Iraq has become and fails to see the need for criticism of the current events in Iraq.
But I do applaud the fact that he is willing to nail his colours to the mast. Yes, the overthrow of Saddam Hussein was a good thing, and lets face it, it was never going to happen any other way. It is a sad day when the left wing would rather support a tyrant rather than freeing the oppressed.
I have simplified the arguments of this book but I urge people to read it and think about where they stand in the political spectrum.