Why Are ‘Tabernacle’ And ‘Communion Wafer’ Swear Words in Quebec?

Most English-speakers who’ve studied some French know that, in France, most vulgar exclamations are along the lines of bordel and merde (and bordel de merde). But in Quebec, much to some innocent students’ surprise, the bad language seems to center around the Blessed Sacrament. Mais pourquoi?

Source: Slate 03/26/12