the answer is - it doesn’t matter. the biggest learning from the nazi germany was that you don’t need the entire population of a country to be homicidal psychopaths. all you need is a small group of those psychopaths, control or media, propaganda and you get a perfectly functioning system where normal everyday folks go to their normal everyday jobs.
just those jobs are in gestapo. or in maintenance of gas chambers. or making food for the equally confused soldiers.
of course, we should avoid civilian casualties as much as we can (but apparently russian army is not required) but the system needs to be stopped.
russia has cancer. chemoterapy is not a pleasant procedure that affects both ill and healthy cells. the alternative is, unfortunately, to allow that cancer to spread to the entire planet.
Of course we cannot. I agree with you that nobody is born evil or a criminal (even psychopaths are not guaranteed to become serial killers).
By all means, if not for propaganda, we would live in a very different world.
But the unfortunate fact is that they did consume enough of that propaganda to do nothing, or worse, follow the orders.
Yes, they are not criminals by nature, but what they do is crime or at least they are an accessory. https://en.m.wikipedia.org/wiki/Accessory_(legal_term)