Carney does himself no favours with the kinds of statements he makes, but the reality is, he doesn't have a history in politics, so he doesn't think about how things he says can be misconstrued.
Saying things like not being able to rule out Canadian involvement, are saying true things. He's right, we can't rule out involvement, but that doesn't mean military support. It could mean any of 1000 different things. He's pragmatic, and speaks with the language of pragmatism, not the language of politics.