Let's not confuse two threads. The imperialist interpretation I'm referring to has been mostly forwarded by
@ssu, which I'm replying to. I take it as a given others have read that interpretation, so I don't need to set it out.
And nowhere have I given justification, only explanation. I think most countries largely act immoral, driven by
real politik considerations. I condemn Western's needless fanning of the flames in Ukraine, increasing their own "security concerns" as a result, raising Russia's security concerns in return. But I note that the facts I raised do not concern Western security at all. Only Ukraine could be affected by the "near abroad" doctrine and we can hardly complain about economic integration. So we can wonder in what sense Western security concerns were protected by expanding eastwards.
Those considerations can only be of a geopolitical nature and not a direct military threat for which NATO is in principle the answer. For existing NATO members there never was a reason to expand NATO after the cold war when the threat had actually largely dissipated. And yet we did it any way. Attempts at de-escalation repeatedly failed and that's not just the Russian's faults.
My main problem with "real politik" views towards geopolitics is that they a) ignore the international legal framework (but of course it will be whipped out when it supports an argument) and b) a predisposition towards conflict that must be won if it materialises, instead of fundamentally aiming at avoiding conflict. But the West (particularly US) will pursue conflict if it furthers their geopolitical agenda even if facts don't support their position (Afghanistan, Iraq, etc.).
If then historically we've seen the most successful roads to peace have been extensive integration and co-operation then these decisions are consequences of us-them divisions, maintaining status quos (to stay top dog, you have to kick down the competition) and projection of power. So to me, the very methodology of framing international relations in
real politik terms is an important driving force towards conflict, instead of avoiding it.
And yes security concerns can justify some action. Not all and certainly not war crimes. But again, I think that mixes geopolitical theory and international law. I think I've said before in this thread:
1. from a geopolitical/international relations point of view both Russia and the West are equally to blame for the war in Ukraine
2. from an international law perspective Russia is an aggressor
But since 2 is in any case an optional argument (pace every "humanitarian" intervention ever and western-led wars) it should be ignored in favour of 1 - as much as that goes against the grain of what I studied and worked for for decades as a human rights trained lawyer. 2 is more about how the world should be and could've been if international law hadn't been applied in such a double standard way.