forced Russia to take defensive actions.
You think Finland wants to get back territories occupied by Russia since 1945 or that Putin thinks it will? Finland would have never joined NATO if there would not be Russia's full scale invasion in Ukraine. Same as Sweden.
And, btw, https://en.wikipedia.org/wiki/Finlandization, relations between Soviet Union and Finland wasn't completely fair and equal.
this territory is moderated
Russia is taking defensive actions, not because it thinks Finland wants to take territory from Russia, but because Finland has invited the U.S. to set up bases right on Russia's borders, and very close to one of its major cities, Saint Petersburg.
How do you think the U.S.A. would react if Canada or Mexico joined a military alliance with Russia and invited Russia to set up bases along its borders ?
And I'm aware of 'Finlandization'. That was still a beneficial relationship for Finland (back when Finland still had diplomatic skill & wisdom) but of course I note that you are conflating the Soviet Union with Russia. We are talking about Russia, not the defunct Soviet Union. Finland has enjoyed friendly relations for decades (since 1991) with Russia, without any 'Finlandization'.