I seriously don't get it.........

[CCIP]

As someone who lived on those lands for many years before... well...

Oh give it up.
As much as I sympathise with Finland as a country and as much as I love the people... seriously, I don't believe in this whole scenario. It's a very confusing story; there's not much in the way of ethnic or at least cultural Finns (an overstatement, even!) living on the isthmus at all (I haven't met any in all my years there, in fact). A return to Finland would entail irrecoverable losses to hundreds of thousands of people who own property, property which I don't think either of the states involved would be willing to compensate for. And these are people who, most importantly, never had any ill intentions towards the Finns and had no say in the events which led to the situation.

And, morally speaking, as someone born in Leningrad - again, and this isn't to say anything about my attitude to the Finns - but I think Finland got away with a more-than-fair deal considering the scale of the crime they were conscious, if very reluctant partners in.

The bottom line is that, in real-world, un-idealized terms, Finland's story is (ironically, perhaps) the happiest one of all the Baltic countries, and I've always been very happy for that.