Its all a precursor to setting up a reason to invade Canada. If Canada moves on with a threat to do something with energy then buckle up.
Not to mention, Canada can make nukes if it wants to. It just doesn't. It gave them up, but still has the plans.
Canada relies on US and is isolated from the rest of the world, US can strangle it economically if need be until it folds.
They can also cause divisions inside the country and disrupt it.. we're seeing this already in Alberta.
Canada is vulnerable.
The whole world is going to trade with each other, and just ignore the United States. It'll be a rough five to ten years of transition, but there's been lots of economic situations like that. The US is the past, it's relevance waning.
The US is also far more vulnerable. It's 90% of the way to a civil war already.
Alberta has been going on for decades.