Every country has limited speech freedom - if you said you think Communism is better than Capitalism too much in America, you'd be rehabilitated or shut up in some way before long. Just like it's counterpart would do.
Also, there's no reason why anyone would want to kill around 10 million their country's folk - 10 million workers, soldiers, folk is a resource like any other and you want to have as many resources as you can.
And of course they cared - like you say yourself, gulags are slave work camps, the more the merrier (unless it's over capacity).
Oh, you mean WPs, well, I can believe that (two Germanic races), but Hitler hated Slavs (and races different to his) way more.
http://en.wikipedia.org/wiki/Heim_ins_ReichPoland, Russia were very affected by mass killings - 1/5 population died in Poland, 1/4 in Belarus. Nazi owned war prisoners had something like 15% death rate.
http://www.oxforddictionaries.com/definition/english/axiomatic?q=axiomatically#axiomatic__6Read the Soviet constitution, I have not read the 1936 one, but I'd imagine it's similar to the 1918 one. Not saying it was democratic, but near every country is democratic "by definition".
Edited 5/13/2015 20:15:45