Do you REALLY think that a nation to the west of Russia is going to/was going to invade Russia.
Sorry mate, but you are just a Putin apologist, 100%
What planet are you on...?
The problem with this is twofold - firstly, its that there are a lot of examples of a country to the west of Russia invading it; in the past 110 years its happened three times (four if you count the interventions during the civil war). At the moment it isn't likely that someone would do it, thanks to nukes and the alternative means available to "the West" (as mentioned below), but the security of the western border is a big part (the big part, really) of how any Russian government will approach its policy of defence. Combine this with the interventionist policy of the US since the end of the Cold War, and how mashed up other armies were by the US (most of whom used ex-Soviet equipment and were trained on the Soviet pattern) and it is enough for them to think it is unlikely but not something that could be dismissed out of hand.
Secondly, their focus isn't on a purely military invasion anyway. The focus is on what they call "colour revolutions", where according to them the legitimate (pro-Moscow) government is overthrown by a violent revolt which they believe is sponsored by "the West".
That is how they see they lost Ukraine, how they came very close to losing Belarus, how they understand what happened in Kazakhstan in early 2022 and deep down how they fear the Putin regime will end - in mass protests that the state security forces either cannot suppress or actively participate in.
Of course its far more complex than just the dark arts of the CIA and MI6; the fact they back governments who are usually massively corrupt and massively incompetent creates much of the ground for the "revolt" and its success (a lesson we found out in Afghanistan, and Iraq after our invasions), and the populations can see for themselves how much better the lives of people in Poland, the Baltics and the rest of the former Warsaw Pact have gotten since joining the EU.
From that POV seeing states around them switch sides after these events has ramped up the tension massively, hence where we are now.
I think it behooves all of us in the west, or in Europe at least, to understand this even if we do not agree with it. I don't think the expansion of the EU to the East should stop whilst those countries want to join and are willing to change in order to join, but it should take into account the urgent need to get Russia on-side in this process and there really does need to be a proper assessment of whether NATO is a suitable structure for going forward. For all its success as a defensive alliance, NATO has allowed the military forces of Europe (including ours) to both wither away and become an opportunity for graft; for example seeing the state those Leopard 2s are in Spain and Portugal is just crazy. This is not healthy.
Personally, I think an effective pan-European defence force (which would include us) with common equipment, doctrine, training and logistics (including production, especially of munitions) that can stand by itself without US support is going to be much more viable for Europe, the US and even Russia itself - the US can focus on its main area of concern, the Europeans will be a lot safer as defence will be taken seriously and even the Russians will be able to breath a bit now that the Yank is a lot further away.