The Russians are probably the least likely to want liberating from what I've seen of all Europeans, but I do think a plurality of Russians would want this. Which justifies it. That said, without this invasion of Ukraine and the danger I feel it presents to my homeland (the US), I wouldn't even be bringing this up. The Russian Federation would be on their own. It's just that the leadership over there is now a danger to everyone else.
Even still - I don't see a problem with countries rescuing other countries from despotism, in principle. I eagerly include my own country in this - if a Putin-like figure arose and I was not permitted to speak out or face death, it would comfort me to know that help was coming. The terror of an oppressive regime is its inescapability.