This is what is actually happening. It is a crime and I wish Putin, his close circle and other directly responsible would end their days rotting in jail.

As for Canada turning into China and hosting their nukes. Of course this will never happen and is absurd. But in pure hypothetical world I am pretty sure the situation like this will turn into invasion if all negotiations fail. As a mini example see what happened when Noriega had started switching his allegiances from the US to a Soviet block.

Hm... Not quite. Noriega began switching allegiances to the Soviets well after the relationship with the US became hostile, and well after the US made it clear they want him gone, due to Iran-Contra and other reasons. He was also a dictator who lost an election by a factor of 3 to 1 a few months before the invasion. Bush was still hesitant to invade until a group of unarmed off-duty US soldiers was attacked, one of them killed and others abused in custody. Not defending the idea of propping up dictators or invading countries to remove them, just that this is not a good example of the point you're trying to make.