It is NATO that is fighting in Ukraine. It is they who have been active in Ukraine since 2008. Without NATO’s active involvement so many Ukrainians would not be dead.
Canada joining Warsaw pact with the prospect of Russian missiles and troops stationed there and KGB organising a coup to remove their PM to install a puppet will elicit a similar (or perhaps worse given the track record) response from the US.
Without NATO's involvement, far more Ukrainians would be dead, their children kidnapped, their possessions stolen by Putin's thugs.
If the KGB did achieve a coup in Canada, we probably would invade to put it down. The differences are 1) Euromaidan was a popular uprising, not a coup, and 2) the whole thing would have been over in a week, instead of bogging down into a stalemate and humiliating our army.
Your link is just quoting Putin complaining that Bush wouldn't help him with his coup in Georgia.
Canada joining Warsaw pact with the prospect of Russian missiles and troops stationed there and KGB organising a coup to remove their PM to install a puppet will elicit a similar (or perhaps worse given the track record) response from the US.
And yes NATO tried to pull the same Ukraine stunt in South Ossetia. https://www.theguardian.com/world/2008/sep/12/putin.georgia