> Russia were forced to shore up their vulnerable flank
Russia wasn't forced to do anything. They could've merely quietly dropped two of their delusions:
a) NATO was never going to attack them, unless it literally went crazy, or someone framed Russia so badly that a nuclear response was preferable to any other option. The West doesn't want to trigger a MAD scenario, and are keen to keep the post-WW2 peace and (in the case of the US) bomb less defended countries for their natural resources. Any claims or beliefs to the contrary are a projected reflection of their own priorities.
b) buffer zones outside of the neighborhood is getting more crowded. Big deal, if you are really so keen on a buffer zone, then maybe sacrifice a few square km out of the ABSOLUTELY MASSIVE part of the continent that they already control. Does that mean risking important areas? Oh noes. Security has a cost, so if you're not willing to pay for it, quit whining.
Being comfortable in your neighborhood is not a delusion, it's a core priority most nation states will be willing to go to war over. If you are American, then you will likely not understand this because America is blessed with wonderful location: it does not have to contend with dozens of possibly unfriendly neighbors bordering it, which is a luxury that Russia, China, and India do not have. They are huge landmasses having long borders with many, many different neighbors who are not all friendly. America has thousands of miles of ocean from its bigger rivals, which all but rules out massive land wars and even air wars. Only a blue-water navy can challenge America, and even then the Americans can take the fight to the littoral states of countries like China if they have beefs with them. Can you imagine that with America?
It's the same thing with Russia: Putin has struck a deal with Xi that allows him to move his military assets from the east to this theater, because he feels that it's a strategic imperative to 'clear the neighborhood'.
Russia has given up land and trapped foreign invaders, including Napoleon and Hitler, but it has done so at a huge cost in blood and treasure. From Russia's perspective, it's far more cost-effective to have weak client states that do their bidding on their hard-to-defend flanks, than to have strong, democratic, independent states that can ally themselves with their archenemies.
This sounds reasonable in theory but IMHO is centered in a completely outdated worldview. What European state is an "enemy" of Russia? What European state would attack Russia with military force? It's paranoid thinking by a madman. Russia could have used it's considerable natural resources and top-notch science education to grow their economy and become a prosperous nation but corruption and cronyism at home prevented that.
I am not American. I am from Poland, and we've been attacked without a provocation from both the east and the west, multiple times across several centuries. We're worried about Russia with good reason.
Since my nation was literally behind the Iron Curtain, I can assure you that Russia _has no right_ to invade neighbouring sovereign nations, no matter how "unsafe" they are feeling. Invading Ukraine is an attempt to externalise the cost of having a land buffer, by stealing said land from a nearby nation.
No matter how "cost effective" it is, it has a real price in human blood and suffering. Only a sociopath would agree it's a reasonable solution, if one were to be (or pretend to be) a good-faith geopolitical player. Which is the current perception of the Western stance on the NATO-Russia tensions from the perspective of ~everyone who cares about human rights and the right to national and personal self-determination.
I'm not saying Russia's actions are legal, morally right, or justified. Russia (or, for that matter, any authoritarian nation-state that's barely accountable to its own people) is a threat to all its neighbors. I'm only saying that a regional power that has traditionally been the hegemon will think this way.
> and (in the case of the US) bomb less defended countries for their natural resources.
That's not terribly different from what Russia is doing with Ukraine - they will overwhelm a weaker country for their own strategic reasons, enjoying the impunity granted by a nuclear arsenal (and not just your average one: the largest!).
The power differential is far smaller between Ukraine and Russia, compared to the one between the USA and whatever countries they invaded. I don't think these are equivalent in any practical sense.
Russia wasn't forced to do anything. They could've merely quietly dropped two of their delusions:
a) NATO was never going to attack them, unless it literally went crazy, or someone framed Russia so badly that a nuclear response was preferable to any other option. The West doesn't want to trigger a MAD scenario, and are keen to keep the post-WW2 peace and (in the case of the US) bomb less defended countries for their natural resources. Any claims or beliefs to the contrary are a projected reflection of their own priorities.
b) buffer zones outside of the neighborhood is getting more crowded. Big deal, if you are really so keen on a buffer zone, then maybe sacrifice a few square km out of the ABSOLUTELY MASSIVE part of the continent that they already control. Does that mean risking important areas? Oh noes. Security has a cost, so if you're not willing to pay for it, quit whining.