Canada

There's a middle ground between "completely innocent" and "massive cheats". I think it's possible that the Canadians have all trained in a technique where they release the rock and then point, and the Swedes use a different release technique. When the Canadians do it, it could lead to them sometimes accidentally brushing the rock with their fingers. If it happens it might mean that they broke the rules and that that rock should be removed (or whatever it is they do), but it doesn't mean that they're intentionally cheating.

It really looks like they're poking the rock with their fingers, why else would they point like that? But, I've seen enough people talking about the biomechanics of sports that I know that sometimes something that seems dumb like pointing might just be how they ensure that their bodies are aligned exactly the same way every time. It's like how the Olympic pistol shooters have this weird posture with their hands in their pockets.