But again that is a yes and no too. Western liberal democracy isn’t a concept in the sole purview of NATO and before Feb 22 the same democracies bordered Russia as they do today. That threat, I agree is absolutely there to Russia but it isn’t NATO that poses that threat it’s democracy itself. Sure there’s a connection between the two but it isn’t an absolute.which is why the EU is as much if not more of an existential threat to the Russian Regime than NATO. Both bodies are a product of western liberal democracy but it is the EU that poses the threat you talk of much more than NATO. It was the Euromaidan protests in Ukraine that sparked Russia's increased activity in Ukraine, it was the thought of yet another country on its border with an awful lot of Russian speakers / relatives becoming likely more prosperous that was the threat. Euromaidan was where Russia started meddling in Ukraine's politics and then later invading under the guise of protecting its people, Ukraine. Western Democracy is the threat you're talking about and the closeness of it to Russia's border. It’s also why Russia quelled the Belarus opposition and installed Lukashenko, around that time Belarus was ahead of the Ukrainian curve in wanting to be a part of the West not East.
NATO really is a product of what he wants to crush, as is the EU but he can’t aim at the EU because it will be all too transparent as to why he’s doing what he's doing and wanting to attack western democracy isn’t going to fly with anywhere near as many people, a military alliance is a much easier target.
So yes I agree but also slightly disagree too. NATO is the excuse not the cause of his ire.