https://time.com/6254450/ilya-yashin-a-message-to-the-world-from-inside-a-russian-prison/
Those who traffic in notions of collective guilt are both wrong in principle, and - however unwittingly - aiding Putin's cause.
Two additional points:
I wonder how many of those who complain Russians are at fault for not protesting enough, would themselves be willing to do so if they were in Russia right now, and speaking out meant risking a lengthy sentence in prison, like the 8.5 years Yashin is serving? To put it mildly, conditions in Russian prisons are far from wonderful, and political prisoners likely have it even worse than ordinary ones. I doubt I would have that much courage myself, and the same goes for most others sitting in safety in the West.
As I have argued time and again from the beginning of the war, both moral and pragmatic considerations counsel in favor of opening our doors to Russians fleeing the regime, just as we - to a large extent - have done for Ukrainian refugees (I don't think anyone can accuse of me of neglecting the cause of the latter).
None of this means that Putin alone bears the sole blame for the war and its evils. Obviously, he has many collaborators, including those who are responsible for horrific atrocities. Those people deserve condemnation and - where possible - punishment. But we should distinguish between them and the population, at large.