Re: Post Truth Society?
"NATO on their doorstep?"
NATO was already on their doorstep. I suggest you look at a map and consider the location of Estonia, for example. Now, thanks to Putin's strategic genius, Finland is likely to join NATO, adding one more "doorstep" nation to the alliance. Ukraine will also certainly join, once they've thrown out the invaders. In short, a diplomatic solution to Russia's concerns seems like it would have yielded better results. That's armchair quarterbacking, of course; who knows what would have happened if the invasion had not turned into the current clusterfuck?
In any case, Ukraine was not a member of NATO and seemed to be content to follow a policy of Finlandization, continuing to be a neutral buffer state between the EU/NATO and Russia, but that wasn't good enough for Russia, so they invaded a sovereign nation.
As to the purpose of the missile defenses, why would Russia care if Russia didn't have imperialist ambitions in its pocket?