It’s a matter of poor brainwashed people. So, yes — it is the people of Russia’s fault, but not everyone has access to sensible information. And any given individual, quite rationally, doesn’t want to risk their life to make a pointless stand.
Also, I guess many find it hard to believe their beloved country could really be so corrupt and perpetrate such evil. And that’s understandable.
Letting yourself buy into the regime narratives takes, at the very least, complicity. The people in Russia know the state narrative is unreliable. They know there exist other narratives out there. They choose not to seek them out. It's wilful oblivion.
Being $bad because of $ideology is no excuse for being $bad. That causal vector can be amazingly helpful for forgiveness at a later point in time, but forgiveness cannot start before being $bad stops. Preemptive forgiveness is a terrible idea.
Also, I guess many find it hard to believe their beloved country could really be so corrupt and perpetrate such evil. And that’s understandable.