Here is the email I sent to the corporation explaining why:
Due to your decision to not display the upcoming issue of the Western Standard containing the cartoons of Muhammad I have decided that in the future my family and I will not be shopping at your stores.If you think it is worthwhile you can email Indigo/Chapters here.
Since Indigo does not have a problem displaying works that offend Christians I can only conclude that your corporation does not value your Christian patrons as much as you do the others.
My family regularly shopped at your Barrhaven and Kanata locations here in the Ottawa area. Due to this decision you can be sure that we won't be returning.