What asymmetry are we talking about here? The Warsaw Pact disintegrated because it was held together by force by the Soviet Union and as that had ceased to exist, the Warsaw Pact had no reason to exist either (ask yourself if you think for example Poland would be in a military alliance with Russia if it could choose freely; the same for Czechoslovakia (invaded 1968-1991) and Hungary (1956)). Maybe if Russia sincerely tried to become part of the Western World, many things would look different now, buth we both know it did not.
> Western states chose to expand and entrench NATO
Well if the russians could once think about other peoples as having free agency it would help them immensely to get out of their eternal (and of course false) victim status. Why exactly do you think the Central European states jumped onto the chance to get into NATO as fast as possible? By whom are they feeling threatened? Of course since at least 2008 (Georgia) everyone knows the feeling was right and Russia will continue mass killings of their neigbours unless they meet a stronger enemy.
It should be mentioned that Russia's attempt at "We don't need NATO, we have our own NATO at home" (CSTO) is hilariously awful and failed to keep the peace between Armenia and Azerbaijan just recently.
The Warsaw Pact ceased to exist because it always was a joke and Russia/SU has never had any true desire or ability to protect these other countries... they merely want to discourage them in any way possible from "joining the other team".
Until Russia stops being Russia, they will always be the problem.
They succeeded to some extent to integrate Russia into the Western world, but failed or didn't try to actually change Russia. Already in first Putin's term it becomes clear how will the country proceed.
> This opposition was rooted in explicit assurances
No such explicit assurances have ever existed and if someone claims russian politicians have believed some spoken sentences as ratified pacts, they are either dumb or lying. Anyway, Russia also promised in writing to guarantee the territorial integrity and safety of Ukraine (1994), so there is no reason to believe anything they say or write for the foreseeable future.
> You speak of Russia’s aggression toward its neighbors,
For which they never apologised.
> Yet popular memory outside Russia tends to focus almost exclusively on the Soviet attack.
For which they never apologised and annexed Karelia.
And this is exactly why many people say the only good Russian is a dead one. If the country and nation wants to be universally hated, it should proceed exactly like that.
You can look at this issue from both sides. The Budapest Memorandum was exactly that—a memorandum—and it was never ratified by Russia. As such, it carries no more legal weight than the security assurances provided by NATO. Moreover, it was largely the Clinton administration, together with the EU, that pressured Ukraine to give up its nuclear weapons, since no one wanted the emergence of a new nuclear state in Europe.
> For which they never apologised.
You are also incorrect on the historical point. Russia officially apologised for the Winter War during Yeltsin’s presidency, along with issuing several other apologies for Soviet-era crimes. Finland, by contrast, has never apologised for its own actions, nor does it adequately teach about its own atrocities. Ask the average Finn how Finland acquired Petsamo or about Finland’s role in the siege of Leningrad, and you are unlikely to encounter much regret or acknowledgment of responsibility.
> And this is exactly why many people say the only good Russian is a dead one. If the country and nation wants to be universally hated, it should proceed exactly like that.
And that is just sheer racism and speech hate.
There were no 'security assurances provided by NATO', but I also agree any political agreement signed or even ratified by Russia carries zero significance as they do not feel to be bound by it. They only understand force, not dialogue, and as such can't be a part of the civilised world.
> You are also incorrect on the historical point.
I am correct on that, there is no formal apology for the Soviet invasion of Czechoslovakia in 1968, for example.
> And that is just sheer racism and speech hate.
That may be, but it's also completely understandable in the face of russian behavior of the past over 100 years, of the russian public indifference to the heinous crimes perpetrated by their army in Ukraine and it is still way better and less racist and hateful that daily murdering Ukrainian children in their sleep.