> I don't think anyone really says it's an hostile act

Trump does. His inner circle does. His supporters do.

> Canada and the US will have to decide what it means for their ongoing relationship.

Sounds like an abusive husband's version of "think of what this will do to the children."

> Why anthropomorphize geopolitics?

Because some people need to have complex issues explained to them in ways that are simple to understand. Particularly when it comes to issues involving Trump politics, the people who desperately need to understand these issues are those who also seem to need the issues explained to them like they are a fourth-grader.

Hence, the replies you have been seeing.