In this article, we shall first assess to what extent islam may be put forward, on the basis of freedom of religion, to claim the legalization — or at least the decriminalization — of polygamy. Then, we shall try to identify the motives behind the attachment of some Muslims to polygamy by comparing the case of polygamie to that of slavery which is also a subject of Quranic revelations. Finally, by evoking the saga of the renegade Mormon sect of Bountiful (B. C.) with regards to religious freedom, we shall see how the politico-juridical treatment of polygamy might stigmatize the Muslim minorities of Canada.