The bombing of the ice-road seems to be a misconception of mine, though I personally wouldn't put it outside the realm of possibilities. Most contemporary Finns really don't really like engaging with their own history critically.
On the concentration camps in Karelia though one can find multiple sources, like this, or this one that delves deeper into Finland's past, also discussing Finnish treatment of Jews during the war.
On the issue of The White Butcher (ie. the deeds of the White Finns and Mannerheim against the Reds in the Civil War in 1918): many of the sources I found were in Finnish, but some can be found in English. Such as this, this. The whites tended to "shoot on sight", under Mannerheim's decree, with the local church unsurprisingly playing tow to anti-communist messaging.
Seems to be a skill-issue, huh? Do you have any sources on your claims of human waves? I'm willing to take a gander