They might be classified as 'Christian Democrats' (social right, econ. leftish). Not familiar with the West or Christian democracy, though.
Not sure about the SoCreds in particular, but these church groups were strongly supportive of womens rights. McKinney (of the Famous Five) was an MLA for, and another was a major player in, the United Farmers, which had close ties to the SoCreds and when the UFA was falling apart, many members jumped to the SoCreds.
Once again, the West was the centre of progressive thought in Canada through this period, with the large number of Eastern European immigrants having a large impact. Manitoba first gave women the vote, the Persons Case arose from Alberta, Socialized medicine was started in Saskatchewan (Douglas was a Baptist Minister). The NDP's early base (and even more so for the CCF) was the West.
There is nothing preventing Christian groups from being both economically and socially left. The most prominent groups, the Catholic and Anglican Churches and the as modern Evangelism in the American South have a long history of conservatism, the former being very hierarchical in nature while the latter are in a very conservative area and follow the will of their congregations.
The whole Social Gospel movement was religious (particularily with those of the United Church, Presbyterians and Methodists who remained independent, and Baptists) and prmoting prohibition, protection of minorities, womens rights, labour unions, public education, equality, etc... In fact this movement was a strong force behind the creation of the United Church, in order to work together in a common purpose and give the congregations more power through numbers.
As to our personal opinions on proportional representation, we just appear to value things differently and there isn't any more discussion to be had.