An October 2011 poll conducted by the Citizen Society Research Lab at Lethbridge College found that 72.1% of Albertans supported same-sex marriage, while 27.9% opposed it.
When one looks at a broader scope of social issues, we see this comparing Alberta to Quebec.
Support is one thing - but are they going to vote against a party for not supporting these things? The result of the provincial election is telling. It is clearly not a hard red line.