For social conservatives:
1) Adopting the platform of the free market right with nary a second thought, which shuts out voters who might otherwise be amenable to our message. Our economics should ape the Christian Democrats and One Nation Tories.
Would there be a potential for a European (or Latin American) style Christian Democratic party in Canada?
It would seem that you would always end up being dependent on some more hard right "partners" to create a competitive party in a FPTP system, but maybe not in all provinces?
Actually, I'd argue the Conservatives in Atlantic Canada fit the bill pretty well. The region is rural and economically depressed, which produces politicians who love the safety net, and some have a socon streak. In Nova Scotia, they actually run slightly to the left of the Liberals (who represent well-off suburbanites).
As for a federal party like that? No, that's a pipe dream so long as we use FPTP.