Various RC clerics have tried denouncing the Prime Minister, including the excommunication crap and so on, and nobody pays any attention.
In the 2001 census, 43% of Canadians self-identified as Roman Catholic (down from 45% in 1991) -- largely because of the relatively homogenously RC francophone population of Quebec and in the rest of Canada, and also because of disproportionately RC immigration (Haiti, French Africa, Indochina, Europe). ("No religion" was 16% nationally, up from 12% in 1991.)
http://www12.statcan.ca/english/census01/Products/Analytic/companion/rel/canada.cfmHowever, the Roman Catholicism of generations born since 1950 in Quebec is pretty nominal.
It was Quebec juries in the 1970s who refused to convict Dr. Henry Morgentaler of violating the Criminal Code provision that required certification of medical necessity before performing abortions. More people in Quebec (including couples with children) cohabit without marrying than anywhere else in Canada. Quebec has had formal "civil union" arrangements for same-sex couples for several years. And the Quebec courts, like courts in most other provinces in the last few years, required the provincial government to issue marriage licences to same-sex couples, and it did.
The constitutional division of powers here is rather confusing. The federal govt has jurisdiction over "marriage and divorce". Marriage, to ensure a uniform set of rules throughout the country (things like the prohibited degrees of relationship), and divorce, because when that part of the Constitution was adopted (1867), the only way to get divorced was by an Act of Parliament. The provinces have jurisdiction over "the solemnization of marriage in the province", i.e. the formalities of getting married, including licences.
It was the provincial rules that were challenged in the courts, when the provinces refused to issue licences to same-sex couples. Once that rule was struck down, the provinces had just gone along on the assumption that there was no federal rule to prohibit same-sex couples from marrying. The bill passed last night formalizes that assumption, by formally recognizing that "marriage" extends to all couples.
Anyhow, to get back to our sheep, the RC church is pretty much sidelined on this. Most Canadians who are RC are just like anybody else when it comes to contraception, abortion, divorce, cohabiting, etc., in their personal lives.
The RC church, other than those few extremist clerics, hasn't been in the forefront of this debate. It's been the fundie types, and notably (this being where we differ from the situation in the US) fundies from a variety of religions other than Christianity, and from certain ethnic groups within the christian churches. One thing that was great to see, a few months ago when the Supreme Court was considering the constitutional reference on the fed govt's power to enact this legislation, was the guy from the Chinese Canadian National Council who pulled no punches when he said how Chinese Christians were being exploited and manipulated by right-wing interests.
Life here will now just go on. ;)