The USSR wanted Finland to give it areas including the main Finnish defensive line. Knowing what happened with Czechoslovakia and “just a few areas” and knowing what happened to Baltics, it’s easy to see what road that would’ve taken Finland down on.
You’re saying the Continuation War happened solely because of the Winter War
No, I’m saying Finland sought help from the Nazis because during Winter War Finland was left completely alone, the preferred alliance direction of Nordics or UK/France/US panning out to not have done much at all. And both sides, USSR and Finland knew it was just a temporarily truce and another war was coming. Obviously Finland didn’t want to be alone, again.
the noted anti-communists were in no-way ideologically aligned with the Nazis before the USSR’s attack
Mostly the Finnish leadership were noted anglophiles.
For sure. But both sides saw another war coming and with how close Finland was to being fully occupied, the worry was that this time Soviet Union wouldn’t stop until they had achieved that. Understandable worry in my opinion, even though fighting alongside Nazis is a black mark on Finnish history.
wanted Finland to give it areas
And offered more area in Karelia in return, it wasn’t some kind of a one-sided deal
Area cutting through the Finnish main defensive line and an important peninsula and harbor close to Helsinki vs. areas in the middle of nowhere in Karelia. It wasn’t a one-sided suggestion, in fact by area I think the offer was bigger, but it’s easy to see why it wasn’t accepted when you consider what would be given and where.