Soviet Union invaded first

Finland took soviet territory, Soviets wanted the unjustly occupied territory back. I say its fair. They didn't invade all of finland.

You say that like they were okay with it. From what I hear, it’s a source of considerable bitterness, especially given that all the Finnish people in the area were forced out.

good for them, its war, they lost. Finland shouldn't have gone for a greedy land grab.