It's done mostly out of compassion with the average Russians who have no say in the matter. I think it's important to remind people that it's specifically Putin who wants this war, and that most Russians don't. Just like we try not to blame the average German for Hitler's mad aggression.
As many people have pointed out, comparisons to Hitler's conquests at the start of WW2 are not unjustified; Putin is using much of the same rhetoric that Hitler used. His state media is actively discussing the need for genocide. Those "same feelings as Hitler's Germany" are because the facts are far too similar.
Because he controls the media. There have also been very persistent protests against the war. Russians in a position to speak freely often criticise it. That's not true for the majority of Russians, however.
People, including elites in Putin’s inner circle, perceived as insufficiently loyal to Putin have experienced a rash of widely reported “murder-suicides” of their entire families, and others who have avoided that fate have experienced, other very public, severe adverse consequences.
This, along with Russia’s notoriously pervasive secret police and domestic surveillance may have something to do why even “anonymous” polling of Russia finds fairly small numbers of people willing to say they don't support the regime wholeheartedly, independent of actual sentiment.
As many people have pointed out, comparisons to Hitler's conquests at the start of WW2 are not unjustified; Putin is using much of the same rhetoric that Hitler used. His state media is actively discussing the need for genocide. Those "same feelings as Hitler's Germany" are because the facts are far too similar.