We're talking about some very rural populations here, so focusing on "census agglomerations", which require a population centre of at least 10,000, will miss out on some of the main locations.
But also, the issues TheDeadFlagBlues was noting don't go away even when we restrict ourselves to "social conservatism". These religious agricultural communities in southwestern Ontario often have complicated or even negative relationships with the military and monarchy, which are important to the kind of traditional Anglo-Canadian cultural conservatism that is strong in eastern Ontario. Note that the Afghanistan/military questions on Vote Compass appear to show the reverse pattern, with eastern Ontario taking the more "conservative" position. It's not clear how exactly to weight things like this.
That would explain the traditional Liberal support in the region