> 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 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.