What the author is missing is that Islam is fundamentally against pluarlism, and that a law tolerating Christians, for example, would be against the Koran which bids its followers to slay the infidel.
This rest of the story...." However, not only does the constitution deliberately leave those fixed principles to be defined by the natural democratic process in accordance with the changing values and sentiments of the Iraqi people, it unequivocally states that no law can be passed that contradicts the basic rights and freedoms outlined by the constitution."
Koran which bids its followers to slay the infidel.
And other verses say the opposite.